tryptophan thighs

the phenomenon of cats falling asleep in certain people's laps. some people just have an amazing ability to induce cat naps at any given time. these people have tryptophan thighs.

wow how did you make butch cassidy fall asleep so fast, he was going crazy a mere 5 seconds ago.
idk, it must be my tryptophan thighs, he's passed out already.