lol...i personally think that female would wear what they desire on that day only lor...maybe some love to wear thong all the time...some don't wear at all, we'll never know..it's our personal thing afterall
i personally wear underwear all the time, eventho in my room i take off my pants too, but no no for me without underwear, just a habit to have the underwear tightness wrapping around.
i don't even wanna know how it feels like if all in a sudden there is a rat around biting there. aiks..ouch