I think that the benefits are more of the mental variety than the physical.

Men have it easier of course, not having to sit all the time, but when I, ah, do the "other thing" the only public place that I'm not skeeved out - that I find to be consistently clean - are the bathrooms in casinos, where there almost always seems to be a guy cleaning.

I see nothing wrong or strange with an unwillingness to have part of your body come in contact with surfaces where other people have sat recently to, um, dispose of their body wastes.