I've always thought that people would find graph theory more interesting if only the problems were presented in a sexual nature.

Though the number of NP hard jokes made about the Traveling Callgirl/boy problem would really be out of control.

In regards to the original commentary, I've always understood polyamory to be the practice of maintaining multiple loving relationships at once, whereas polyfidelity is the subset of polyamory in which the relationships form a closed system. It is a source of much frustration to me that people tend to use polyamory when what they are actually participating in is polyfuckery. But that's humans for you.