Well, I'm old enough to remember Voltron sooooooo, no, not a kid.
Also, interlock like Voltron? Or
this guy? Hi-larious. Don't mess with Andorianator!
No need NOT to think about aliens' genitals. People wonder what's under Breen helmets...well, why not wonder what's under everybody's shorts? Plus I always LOVED seeing stuff like
this...wondering what other creative biology was
just under the uniform (hehehe) and not just on the forehead.
As for the reproductive parts themselves, like all aliens, they SHOULD be very different from humans' parts but alas, are probably not. If for the only reason that it'd be kinda silly for aliens to be utterly humanoid in every way save for a few little skin folds here and there yet have VASTLY different anatomy just in that one place - apologies to Londo Mollari and the Centauri race.
Fanlore.com was, sadly, eye-opening. Why always with the K/S?
Smart point on Vulcan breast not being pointed. Our genitals don't look like our ears or foreheads...why should an alien's?
If I were a better artist, I'd try to sketch some parts out. For the time being, I'll just have to wonder. Suffice it to say, I imagine Klingons to be rather wooly down there and Ferengi to be rather not.