Re: male curiosity
No it is not okay to be having casual sex with your friends. Learn to control your hormones and urges and don't give in. Just because you may have the desire doesn't mean you should act on it. Anal sex is very risky and can cause some damage that may lead you to go to the hospital so you'd definitely have to explain what happened to your parents and I doubt you'd be okay for that.
Also you are definitely not mature enough to have sex because you're coming here on a teen forum to ask us who don't even know you. Wait until you're much older before doing any kind of sexual activity and until you become more educated.