>among all primates, if mama ain't happy, ain't nobody happy... and one way to keep mama happy is sex.

Apart from the rather disturbing oedipal overtones of the above, "all primates" is taking it a bit far. Last time I looked, I approximated the definition of a primate, but I gotta say that I would be hard-pressed to think of anything that was less important to me , or less relevant to my survival, than my mama's happiness.