grab his butt
Well that means they're gay, obviously.Not necessarily, they could be just curious.
Nothing except the possibility of the relationship getting stronger. But Gay/Bisexuality is perfectly normal.
What about ix. There's no real question here. lt is possible. Yes. Nothing magical happens. Just like a boy on girl, or girl on girl. Love is love. Sex is sex. In a nutshell.
Yes, boys can kiss boys.
if that's what you want there isn't a problem with that