Whether or not you enjoy anal stimulation has nothing to do with your sexuality. You need to relax. Having sex with another man isn't going to turn you gay or bi, or even make you straight. You are one of those already, regardless of whether or not you ever have sex with a man or ever do. You say you used a vibrator and didn't hate it. I assume that was an understatement, since it is driving you towards trying bottoming. That is perfectly cool. But the complication is that you say that you don't find men attractive. To me, there seem to be two possibilities here. First, you are in denial and, in fact, do find men attractive on some level, but societal pressure is pushing you to deny that. Consider that possibility, but only you can really ever know. Secondly, you aren't in denial and you just want to feel another man's penis inside of you but you don't want any other part of him. In this scenario, let's change things up and make this a heterosexual encounter when you are about to have sex with a woman. However, she says that she doesn't find you attractive and she doesn't want to make out with you at all, and certainly doesn't want you enjoying her tits. Your job is to get undressed, slide you hard cock into her, and pound away until she gets her orgasm. at that point she might be nice enough to let you get your orgasm before kicking you out of bed and being done with you. This kind of thing is what seems to be what you are expecting of your male partner. Does this seem reasonable to you? The worst part is that you probably could actually find some gay or bi dolt who is willing to do this, but I ask you to respect your partner. If you aren't interested in guys, don't have sex with them. If you are interested in guys, then have actual sex with them and don't use them as your surrogate vibrator. Lastly, consider having sex with a woman using a strap on, if you aren't interested in having sex with a man (all of him, not just his penis).