Penny is very surprised when Sam shows up for her hot tub party since guys with small dicks usually avoid skinny dipping. Sam did not realize it was a no clothes allowed event so Penny explains that his little penis is going to be a huge embarrassment. To prove her point Penny suddenly yanks his pants down to his ankles to show that he blushes just from getting pantsed in front of one person. Penny knows shyness is not the only reason he should avoid a pool full of naked women-Sam will definitely pop a little beta boner as soon as the bikini's come off. He would probably spooge in the water if a girl bent over in front of him and Penny tells him so right to his face!  As a final demonstration of his total lack of cock control Penny strips naked herself and starts to tease him to show how easily he gets excited.  She proves her point a little too well though when Sam completely humiliates himself almost instantly!