If you take yourself seriously enough, you can shave your legs and put on a lycra unitard and run around in a ball field and not find yourself ridiculous. So, skinsuits are a sort of testing mechanism for your dedication to the sport.
yah, not to get snagged on your pedal when you are carrying. also, the material is made up of the same stuff that shorts are: much less permeable to the wind. therefore you stay that little bit warmer wearing a skinsuit. they are great but you gotta have the body to wear it otherwise you look like a stuffed sausage.