(Errect) Penises can be extremely hot (for me a big part is the indication the other person also attracted to whats happening), and the feel/heft of it.

A well toned upper body and back (besides just looking good) also project a strength that can be quite attractive, especially if combined with emotional vulnerability/intimacy.

(Ik this wasn’t your question, but) on the other hand excessive body hair, especially on the ass/upper body can be quite the turn off for me.