Whats up with all the hybrid dragons in greek mythology? (Is it just like in D&D where the dragons are just horny on main for humaniods constantly?)
It actually isn’t like in D&D. While Greek Mythology does have instances of humans mating with animals (such as in the case of the Minotaur), most of the hybrid dragons seem to be cases of snakes and serpents being grafted onto other creatures as limbs or hair.
The most obvious case of this to most people would be Medusa, who is known for her serpent hair, but she’s not the only one. Typhon, a monster which battled Zeus, was said to have a beard of serpents, as well as serpents for legs and arms and fingers. Cerberus, in addition to having three canine heads, is also described as having live snakes in his hair and around his necks like manes. In addition to a snake for a tail.
Echidna is fairly tame, compared to her husband and son, in that she has the torso of a nymph and the tail of a serpent. Note, though, that some sources describe her serpent half as man-eating, so it might have a head.
Kampe, meanwhile, is described like this:
...the head and upper body of a beautiful woman, the lower body of a dragon, a massive scorpion's tail full of venom, snakes around her ankles, and 50 grisly heads of various creatures (wolves, snakes, bears, lions...) bubbling around her waist. Her fingernails were "curved like a crooktalon sickle", and she possessed black wings on her back.
Make of that whatever you will.
A lot of these creatures are the descendants of Ceto and Phorcys, two titans of the ocean both depicted and described as being fairly monstrous, so it seems as through a lot of the serpent pedigree is starting here.
But why so many composites? Greek Mythology has a lot of composites in general, so I think it might just be a case with that. Add in the snake as a common symbol, and you end up with a lot of serpent hybrids.