Five second rule

The rule that states if a guy is in and out of a girl's vagina (and finishes) while having sex in five seconds or less, it doesn't count toward his body count.

These girls should call me the delivery guy with how often I enforce the five second rule.

three second rule

The rule goes as follows...
"If a food item falls to the ground and you pick it up in less than 3 seconds, you can pick it up"

*Friend drops an entire pizza upside down*
"three second rule"