Re: male curiosity
If you do something twice, it can no longer really be considered 'experimentation'. The experiment is over, the curiosity is satisfied. You're doing it because you enjoy it.
It's not surprising that if you enjoy oral sex with a guy that you'd be 'curious' abut anal sex. But, aside from what everyone else has said, you might consider what doing this tends to suggest, and if that's something that's comfortable for you, if you see yourself that way.
Sometimes, those urges can be pretty strong, but it's always a good idea to think about what it is your urging to do, and decide if it's really worth it to you.