Long lines at public bathrooms

At last, the mystery of the ages is solved. "Why do long lines form at women's rooms, but men can just zip in and out of the men's room?"

For years, we've tried to explain it away by discussing clothing. Men's clothes are designed so they can pee while still fully dressed, whereas women need to partially undress to pee. This is indeed a significant reason for men's quicker "pee speed".

Urinal + toilet numbers which are higher than the number of toilets in the women's room have also been a factor in many cases, although that has been rectified in some new construction by better balancing the numbers.

But has anyone been taking sinks into account?

( Overheard at a restaurant... )