How can you tell if your friend is gay

That's not something you ever want to put another person through. So if you ask everybody if that person's gay, all you're doing is making the person's life more complicated whether or not they are. Besides, there are plenty of heterosexual males or sporty females out there. This can show him that you're ready to be a support network if he needs one. Look for physical cues. Or the ring could have another meaning to him. Give him the opportunity to tell you.

A person's comfort with the opposite sex has nothing to do with their sexuality.

He gives you that look. Don't judge based on feminine voice or way of talking. Rather than probe me for more information pun intendedhe turned my nontraditional sex practice into a repeat joke.

People have this need to put people into boxes for some reason, which is why people are so obsessed with trying to figure out what someone is or isn't.