A couple decided to use sign language before having sex so as not to arouse suspicion from their housemates.

Wife: When you want to have sex, just fondle my LEFT breast once. when you dont want to have sex, fondle my RIGHT breast once. OK?

Husband: thats fine. when you want to have sex, pull on my penis once. when you dont want to have sex, pull on my penis fifty times.

cheers

p.s. i guess this is adult humour section. what are you kids doing here anyway? :)