What would be wrong with a guy liking shoujo? Shoujo tends to be funnier and a little more in-depth than some of the shounen shows around.
And girls like shounen. Why not the other way? I'm a girl who started with shounen then realized there was a difference between shounen and shoujo. ^^;; Didnt know there was one for a bit...
That'd be like saying "only girls can wear skirts and dresses" ... Maybe that's not the best example, unless you're a visual kei - er.
Uhm, I cant think of a good analogy right now. Maybe I'll edit this later when I think of one.. ^^;;