the stain that appears when you havnt had a wash for a good while and sit on the bed and hey presto the chocolate ass lips appear on the sheets!
wife: whats this chocolate on the bed!
reply: it must be the kids again eating chocolate on our bed!
wife lowers her nose to the (chocolate stain) WHAT THE FUCK, THATS SHIT
reply: ohh thats just my chocolate ass lips!
(just blame the kids)