Penis Check
When a man needs sexual gratification off his woman, he asks for a penis check. The woman is instructed to play with his balls, feeling for any abnormalities, then after wank the penis to ensure that is fine. If the woman refuses to do the check then the man can use a guilt trip and say. "Your checking for testicular cancer."
Man "Hey babes i need a penis check its Sunday night."
Woman "Not now."
Man "You dont want me to get cancer now do you?"