A lot of guys are attracted to the fantasy of bareback sex. They haven't done it, so it's a mystery and there's an attraction in finding out what it's like. For many, the difference in sensation between fucking raw and wearing a condom is minimal. I think the major difference is mental - the idea of fucking like that - it's a very intimate, sensual act that makes the participants vunerable. I've bare fucked - prior to the HIV need for safe sex and in long term relationships, with both of us negative; and I've used condoms for casual sex. So, I know what both are like. I would not bare fuck a guy I just met or was just hooking up with. I'm not taking the risk of infection and the effects of that for a moment's pleasure.
Personally I like to fuck without a condom. I like the feeling, and I only do it with one man that I've been in a relationship with for 15 years. That does not mean that I only have BB sex. If I were not in this relationship I would not be practicing unsafe sex. Period. I don't have an issue with guys in committed long term relationships that practice BB sex, as long as they've established that they are healthy and are not fucking around outside the relationship.
For the guys that have never had bareback sex, and want to know what it's like, all I can say is wait until your in a committed long term relationship - it will give you something to look forward to.