I was just wondering this……

That would depend on whether you're a boy oder a girl. It's different for each. I've found oral sex to be quite efficient, but for a guy, he sticks his penis in another guy's anus. I'm not sure how girls have sex with each other, besides oral.

Guys have anal sex and girls use dildos to have sex.

Lesben use different methods such as fingering, cunnilingus, toys, and such. Gay men use oral, hands, and anal. And that is all I know on the gay male matter. And I'm not going into the matter of BDSM.