Say Bob and Charlie are not family, but are close to one another. Really close. Bob is younger than Charlie, and Charlie is quite happy to take Bob under his wing. He guides Bob to his place, whether in the world or simply in one social circle. However, Bob and Charlie's affection for each other is a bit more than fatherly. This dynamic applies to a gay couple (or simply an ambiguous one) in which one partner is much older and acts as a Mentor to another. In this dynamic, Charlie is most often powerful and successful, and Bob is most often attractive in one way or another, as well as an Uke.