If two friends of opposite gender are bored for over an hour, they must engage in sexual experimentation

There is no rule 11

If one believes there is likely a mutual interest between themself and another individual, that other individual is either already in some form of a relationship with another individual or will soon be.

Rule 11 applies if a word isn't defined yet in the Urban Dictionary.

If it exists there is a slutty halloween costume of it

Watching Porn with your friends is gay.

This rule is also known as "The International Rule of Dibs". Used to claim any tangible object in question. The only way to counter this rule is to call "Next's".(see Rule 17)