Yes! I am in the firm belief that Sollux has two bulges. I also believe Sollux has a split tongue just to keep up with the theme of duality.
I like thinking about anatomical features of the trolls (all over the body, not just genitalia), because I see a lot of ideas where the comparison is very humanized, which is strange to me, because even though the trolls stand upright and walk bipedally, and have structures similar to humans (two arms, two legs, similar muscles), I feel there is much to be desired in thinking of perhaps their teeth, eyes, horns (erogenous zones or not), claw/toes, and yes, even their genitalia.
But I’ll just stop there and say that I think Sollux with a split tongue is really hot.