Reptiles naturally inbreed. Humans out breed. the reason is, we artificially support genetic defects, so they are passed along.

In nature, a genetic defect, stops right in its tracks. No medicine, no doctors, no hospitials, no vets, If something is born/hatched with defects, its dead right there. end of story, That line of genetics stops.

Humans support inferior genetics with intelligence. Something to be said for that, I guess. hahahahahahahahahahaha.