I've had similar issues. I've only ever been intimate with women and only ever had 2 serious relationships, one of them being a marriage (currently divorced) but I can't help myself wondering what it would be like to be intimate with a man. I don't even know if I would like it or not but I do get off sometimes watching gay or bisexual porn and I find myself practically drooling over a good looking cock and wishing I could have it in my mouth. Like I said, I don't even know if I would like it or not but I'm an extremely open minded person and have a "I'll try pretty much anything once" type approach to most things in life. I don't see myself as someone that could have a serious relationship with a man though. I think my fantasies are just something that I feel like would be put to rest if I could just get them satisfied.