[quote=@Taaj]To everyone that answered the question: Clearly the up-tuck is for people who fear midday boners. Everyone else is confused, not easily boner-fied, or has a micropeen.[/quote]

This made me consider the possibility that your boyfriend still tucks up his dick as a leftover habit from high school. You'd think that, at his age, he wouldn't be susceptible to random boners any more.