Which sex is the best for sex?

"Vell, Vell, Vell vittle man" Inga says "you should consider your self luck. You are helping to answer one of life's mysteries, which vender is the best for sex?!"

"Now I already have a sample of your response as a male, so now all ve need..."

She pulls down a huge switch which cause a giant sci-fi laser / **** ray looking thing to slowly rise up and then she throws a second switch,

"... Is to..."

The device starts to glow pink a shakes around a bit.

"... CHANGE VOR GENDOR" at this she starts laughing like the mad scientist she is.

You then suddenly pass out.