I know why, I find it gross!
Michael Jackson (the beer guy, not the other one) wrote something like, "Saying 'I don't like beer' is like saying 'I don't like food' - there's such a wide range of beers and beer styles out there that anyone can find something they like."
If you don't like beer but like wine, try starting with a lambic - it's a slightly sour Belgian beer style that's usually flavoured with fruit and bears very little resemblance to a "normal" beer.
There's lots of good beer out there. Unfortunately, there's also lots of bad beer, so sometimes it takes a while to find the ones you really like. If you don't like the mainstream stuff, try the non-mainstream. If they sell single bottles/cans at your local liquor store, that can be a good way to explore without spending a lot of money - just buy one of each one you're trying out, and when you find one you like, remember it!
:drunk: