You'll never know until you ask
If you meet me on the street, in the bus or at the beach you'll never be able to tell, I'm a classic dresser, I don't like Lady Gaga (she creeps me out), I don't turn around when I saw a beautiful dude so I can have a longer view on his ass, in fact you'd never be able to tell, so that "famous gaydar doesn't exist" LOL. When in public with my dude, you'd have a hard time to tell as well because we don't melt in each other's eyes, we don't share a milk share with two straws (I'm lactose intolerant anyway), we don't walk hand to hand and we don't kiss or hug in public. Neither of us have a gay look, Alex does look good and so do I but not the obvious gay attitude and gestures. And we call ourself honey and sweetie when we are with friends or in our house otherwise it's Jake and Alex. Yet we are a couple.
Same goes for some guy that seems to be so effeminate and yet they turn out to be exclusively heterosexual, hence why I said that no one can tell.
As a bisexual I have no issue to aboard gay subject with friends or other people, when I am with friends and they'd see someone and label him as gay, I normally replied that I am part gay and that I don't see why this dude look gay because you find him attractive. It's okay dude to tell another guy that he is attractive. As Tjerk said it so well, there's more to life than sex.
So there is what we call the non-verbal language or communication if you like and this is something that you might want to learn about. Nonverbal communication is behavior, other than spoken or written communication, that creates or represents meaning. In other words, it includes facial expressions, body movements, and gestures. Nonverbal communication is talking without speaking a word. It is very effective, maybe even more so than speech. Remember the saying, “Actions speak louder than words.”
There are two main types of nonverbal communication. Body language is the first. Body language is body movements that depend on a person’s attitude or feelings. Body language includes the way people walk, how they stand, and their facial features. In other words, any kind of meaning that is shown by a person's body attitude or movements. For example, when a boy is sad he may droop his head and walk slowly. Or, if a girl is happy, she might run and jump or stand up straight and put her hands in the air (and wave them like she just don't care - snoop dog
) ). People don't have to say anything to show how they feel about things. The color of people's skin may even show how they feel. For example, if people with light colored skin get embarrassed, their skin may turn red, or if they are worried, they might get pale. Body language can be voluntary (on purpose) or involuntary (a person can’t help it). An interesting fact is that blind children will smile when happy even though they have never seen a smile.
There are three main uses of nonverbal communication. People often use all of them everyday. The first use is for greetings. Greetings include waves, handshakes, hugs and salutes. For example, when you see your friends in the morning on the way to work, you may wave to them. A more formal greeting would be shaking hands with your boss at work. The salute is used in the armed forces when you see a person of a higher rank than you.
The next use is for specific communication. For example, workers may use signals at their jobs. One important use is in construction when a worker signals to a crane operator to keep everyone safe. These signals are very specific and tell the operator to move left, right, or raise and lower the hook. Another very important use is sign language. This form of communication is used for people who have hearing problems. They use hand signals and lip reading to communicate very specific things.
The third use is involuntary nonverbal communication. These are movements and attitudes that show how people feel. Most times, people don't even know they're communicating when they make these actions, because these actions are automatic. For example, a slumped posture may mean that the person is sad. A stern look may show that the person is in a serious mood. When people rub their eyes, it can show they are tired. All of these examples show how people feel.
From my psychology books to you here's some types of nonverbal communication and body language
There are many different types of nonverbal communication. Together, the following nonverbal signals and cues communicate your interest and investment in others.
Facial expressions
The human face is extremely expressive, able to express countless emotions without saying a word. And unlike some forms of nonverbal communication, facial expressions are universal. The facial expressions for happiness, sadness, anger, surprise, fear, and disgust are the same across cultures.
Body movements and posture
Consider how your perceptions of people are affected by the way they sit, walk, stand up, or hold their head. The way you move and carry yourself communicates a wealth of information to the world. This type of nonverbal communication includes your posture, bearing, stance, and subtle movements.
Gestures
Gestures are woven into the fabric of our daily lives. We wave, point, beckon, and use our hands when we’re arguing or speaking animatedly—expressing ourselves with gestures often without thinking. However, the meaning of gestures can be very different across cultures and regions, so it’s important to be careful to avoid misinterpretation.
Eye contact
Since the visual sense is dominant for most people, eye contact is an especially important type of nonverbal communication. The way you look at someone can communicate many things, including interest, affection, hostility, or attraction. Eye contact is also important in maintaining the flow of conversation and for gauging the other person’s response
Touch
We communicate a great deal through touch. Think about the messages given by the following: a firm handshake, a timid tap on the shoulder, a warm bear hug, a reassuring pat on the back, a patronizing pat on the head, or a controlling grip on your arm.
Space
Have you ever felt uncomfortable during a conversation because the other person was standing too close and invading your space? We all have a need for physical space, although that need differs depending on the culture, the situation, and the closeness of the relationship. You can use physical space to communicate many different nonverbal messages, including signals of intimacy, aggression, dominance, or affection.
Voice
We communicate with our voices, even when we are not using words. Nonverbal speech sounds such as tone, pitch, volume, inflection, rhythm, and rate are important communication elements. When we speak, other people “read” our voices in addition to listening to our words. These nonverbal speech sounds provide subtle but powerful clues into our true feelings and what we really mean. Think about how tone of voice, for example, can indicate sarcasm, anger, affection, or confidence.
See after 5 years of being with my dude, he doesn't have to speak to me anymore, I know right away how he feels, what he's going to say or when he want sex even though his penis is not standing... I can read it all in his facial expressions, voice tone and body language. And he can practically do the same to me. Every one is communicating, even the dude in a wheelchair that cannot move his legs.
ent. I haven't done any of that in 15 years, so I'm probably not the best person to ask. I'll just sum it up by saying that if the other party is interested in you then they will be trying to make sure that you get the message. No one is being coy and playing hard to get; it's just not efficient. 
