there's something about jimmy's energy - boyish, a little manic, stressed out/desperate to be liked and please - that gives him a kind of interesting sexual energy ... like he oozes the sense that he really needs to blow a load or two and relax
Always imagine Seth and Jimmy having sex not with each other but fucking the same person/people together. Seth's at ease charm and Jimmy's more stressed out/manic energy would complement each other as kings at an orgy lol