From one of my all time favorite foodie blogs, Love Veggies and Yoga:
"7. Random life musing: Do men somehow think a woman won’t notice that they left 1 square of toilet paper attached to the cardboard roll of toilet paper? That one square is so absorbent that it’s precisely enough to wipe the urine quantity from a hamster. But for normal sized females, we’d need quite a few more squares than that. Thus, we change the roll and don’t just leave that one, lone, straggly square of T.P. dangling.
Plus the last square usually has glue marks where it’s attached to the cardboard and I don’t want to be wiping old dried glue on my privates."