I used to think that it was right up there with involving poop in the love making process, which is....really, really, really not my thing, let's say. But as my kinks have developed, I've become more open to the idea. I've never discussed actually doing it, and it doesn't hold that much of an appeal to me, but I wouldn't be totally opposed to it.
I think Dan Savage has said it's not a big deal, as long as you don't munch your way through a plate of asparagus beforehand. After several beers or water, it's mostly just water anyway. Besides, you can do it in the shower, and it's easy clean up.
I don't know, it's not a big deal to me. After you've been with someone for a while, you get intimate with the with way their body functions anyway--whether it's having a bit of a mishap during anal sex, swallowing each other's juices, sweating all over each other, holding back your girlfriend's hair if she gets sick, experiencing the dreaded queef during sex, getting a whiff of each other's farts in the bed sheets, or helping them patch up a nasty wound, it's just a part of how intimacy with another human being goes. I'm certainly not going to wither from a golden shower.