The act of trading sexual favors for non-sexual favors: Having sex with someone who you wouldn't want to have sex with "for free", or pretend that you wouldn't have sex with "for free", in exchange for work, gifts, or similar. The whole thing may or may not be portrayed and/or perceived as really being a form of prostitution. This trade may be portrayed in a neutral manner, or it may portray either Alice or Bob as more or less a victim of the other. In either case, the act is often closely related to at least one other trope. Neutral versions (As in, they are either equally good or equally bad)