On the other hand...a guy doing free running in black cargo pants and no shirt...
That is appealing. lol
...*scribbles into his little black book*
..I kid.
Interesting discussion! I've noticed something similar. I've also noticed something interesting. A large majority of girls (Hannah as an example) feel most comfortable and free-moving in tight, skin fitting clothes. For example, look at women's Sweatpants. Usually tight in most places, save maybe the ankles. Hannah doesn't like wearing the loose fitting kung fu clothing. Most guys, on the other hand, especially myself, feel comfortable in loose fitting clothes like sweatpants a size too big. I wear the exact same kung fu uniform, and I'd wear those pants all the time if I could. I feel like I can move the smoothest in those loose clothes, not tight clothing.
So, keeping this on track with the topic, could it simply be that we are most comfortable moving in what we are used to wearing? If girls clothing is typically tight (Athletic tights, the high shorts, tight jeans, tight sweatpants) that explains their preference for tight clothing. Men typically wear looser things (normal jeans, sweatpants, basketball shorts, cargo pants) and so they feel the best in those.
As for being naked..... AWESOME.