Hypothesis on unnatural phenomenon.

The story:

I was sitting at the cafeteria eating. There was a women sitting with her boyfriend at the next table. I gazed at her casually and suddenly noticed something very strange....

( gazing......hmmm....very short skirt...interesting.....woah! )

she was wearing Men's underwear !
Rosso beneath a short skirt is something you won't see everyday..

so, the question is, what is the reason behind this?

A. She's plain crazy. or a lesbian. or both.
B. They had some very wild orgy last night.
C. Men's underwear has superior ventilation system -- ( let it all hang out ! )

I vote C. What about you?