Gay guys do not have a high pitched voice any more than straight guys do. The tone of one's voice is not related to one's sexual orientation. I am gay and sing bass in a chorus. I know a straight man who is frequently called Ma'am on the phone. You may be talking about some gay men speaking in an effeminate manner. This is learned behaviour and most gay men do not speak that way.
Because he gay
Not necessarily. They may just have a high pitched voice which they have no control over.
If they're gay, then sure, why not?
No. Only guys who are sexually attracted to other guys are gay.
Of course. Some guys are closer to other guys than they are with their girlfriends and are not gay.
Not all gay guys are good-looking. Not all good-looking guys are gay. Sorry!
Gay guys, straight guys, and bisexual guys can all get tattoos.
If he likes guys, he is gay or at least bisexual.
No and some ugly guys are gay too.
No. He just has a high pitched voice, loves singing about girls, and enjoys his career.
Gay guys do not try to make their voices high. Sometimes gay men pay less attention to trying to act "masculine" (like so many straight men do) so it may seem "different" to you, but most gay men are just proud to be who they are and don't try to fit into a stereotypical gender role.
Yes. Some French guys are gay, since there are gay people in every country.