You can't tell if someone is gay by looking at their hands.
There is no way to tell. you have to ask him.
Ask him
No, it doesn't mean he's gay. Maybe he's tired of answering questions about it. Sometimes people who "look gay" are not gay at all. You can't really tell by looking at someone if they're gay or not.
You flirt back, but tell her you are gay.
A truly gay man won't settle for a woman for long. Time will tell.
Straight men, by definition, do not lean toward being gay. It's impossible. If a man is gay, then he is gay.
You ask them both what their sexual orientations are. That is the only way to tell.
The only way to tell is to ask him.
No, unless they tickle your todger (man on man)
There really are no personality traits that indicate homosexuality, contrary to popular stereotypes. Homosexuals that fit sometimes a variety of stereotypes do indeed exist but unless you catch a man with another man or looking at gay porn you really can't tell.
No, nothing can make someone look gay, because there is no such thing as "looking gay."