Feeling Frisky?

Per our conversation Saturday night (for those that were there):

Taken from Wikipedia:

The male cat's penis has spines which point backwards. Upon withdrawal of the penis, the spines rake the walls of the female's vagina. The female needs this stimulation for ovulation to begin. Because of this, female are rarely impregnated by the first male with which they mate. Furthermore, cats are superfecund; that is, a female may mate with more than one male when she is in heat, meaning different kittens in a litter may have different fathers.

So I was off on the fact that the guy needs to "lock into" the girl...but nonetheless...it explains all the noise during cat-sex.