An idea that many men subscribe to. It states that if more men with little dicks go out there and have sex and show women a good time, they'll be more open to having sex with men with small penises.
Rico:"How was your date last night?"
Tom:"It was good until it was time for sex, she rejected me after seeing my small penis."
Rico:"Maybe she just needs a little more Little Dick Exposure Therapy, better luck next time buddy."