阿烤腚 to its defination in wikipedia,ｙ你跟老公應該不算．．

Friends with benefits (FWB) is an agreement between two people who are both friends and physically attracted to one another to have a sexual relationship. Neither party is considered committed to the other, and both can start dating someone else at any time with no prior warning. A friends with benefits arrangement is not considered dating, a relationship, or even casual dating by most people who use the term.