The buttocks are like a married couple though there is constant friction between them; they will still love and live together.

The buttocks are like a married couple though there is constant friction between them; they will still love and live together.

臀部就像一对结了婚的夫妻，虽然他们之间有不断的摩擦;他们仍然会相爱，生活在一起。