>>18562907>>18560745Shoot, forgot about the barnacle.
As the other anon said, however, it's actually 7 barnacles than an uber sized one.
The adaptation for such a long penis is to overcome its stationary nature and the limitations it imposes on breeding with as many others as it can.
Since Barbacle is mobile, I would actually hazard to say that its penis size isn't actually that long. If anything, its prevo would be a much longer penis a la og barnacles.