Self-Examination

The instructor was lecturing about self-examination of the breast or testicles when a female student asked two male students if they ever got an erection while doing self-examination of their testicles. They answered that it was possible they had... hemming and hawing, you know, you don't really want everyone to know when you get aroused...

She then asked, "So what do you do about it?"

They said in unison, "Nothing, why?"

She says, "You mean you go around with a hard penis all day?"

They said, "No way!"

She then asked them, "You mean a man's penis will go down without having an orgasm?"

Looking at each other quizzically, they both said yes.

At which point she says, "I'm going to kill my husband!"