Diddle-de-dumb

I've been hearing an awful lot of masturbation jokes lately. Or not exactly jokes but rather references to masturbation that are supposed to be inherently funny just because the word masturbation was uttered. In the movie "Due Date," a dude masturbates to go to sleep. Ha ha ha. And on tonight's "Daily Show," Matthew Perry recounted how he told someone he would "masturbate into some money." Ha ha ha. And Tracy Morgan announced that finds Sarah Palin "serious masturbation material." Ha ha ha.