While I'll personally go with that when I'm going for a gooey character, I (and I assume some other people) don't really like the aesthetic of having multiple penises, especially if they're of different lengths. Along with that, many scenes are geared towards only having one penis, so it sort of feels awkward to imagine the sex scene and have the knowledge that your character has some extra dick that's completely ignored, whether it's an average one or a 4-foot behemoth.Mutli-dick.
Make sure that Penis 1 is the smallest.