He's turned off by bodily fluids, but I'm not...

First off, no, not all guys are turned off by bodily fluids. Plenty of guys--myself included--are fine with or even turned on by them.

Second, with respect to Gunsmoke's comment, I'm not sure you and your partner are fundamentally incompatible just because he currently doesn't have a thing for bodily fluids. People's preferences can change and talking with him about it may help to "enlighten" him, so to speak.

As for how you should go about doing that, it depends a little on the specifics of you, your partner, your relationship, and exactly why you kind of like the bodily fluids thing (and you probably know those details a lot better than I do). That said, here are a couple possibilities. The next time he says something about how he dislikes bodily fluids, try saying something like, "You know, I don't really mind them...In fact, feeling you come inside of me kind of turns me on...It makes me feel so close to you [or, if you're going the kinkier route, something like "It makes me feel used and that's kind of hot" is another option]." Gauge his reaction to this (or a "milder" version if this seems like too much to start with) and see if he seems more receptive to the whole thing. Maybe his mind is already made up--that's certainly possible and, if this is something that matters enough to you, you might want to heed Gunsmoke's advice and think about whether you want to be in a relationship with someone who doesn't seem comfortable with a pretty natural part of sex--but on the other hand, just talking about it might show him that it's not so bad after all and might help change his mind.