When you have a massive boner
in a very uncomfortable situation and your erection
needs to be tucked
into your waist line pointing up to your stomach to conceal it.
Mark's teacher asked him to write on the black board so he had to apply the tuck rule
to hide his boner from the whole class.
Hector was flogging the dolphin to soft core porn when his doorbell rang. Girl scouts were selling cookies.. he had to apply the tuck rule
so they didn't think he was a diddler
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