Mistakening

A different way of saying mistaking

You're telling me I'm not Ryan Gosling? You're mistakening!

humanoidesque

With a resemblance or characteristic of a humanoid appearance.

I thought he was a crocodile, until I see his humanoidesque body.

Scalelish

Having a tinge of scales or having the similarity of scale.

His scalelish crocodile body excites me.

Frictioning

A verb for friction

My flesh was frictioning against his scales.

Unsane

A slightly less serious version of the word insane.

Jack: You're having sex with a crocodile-human?! You're insane!
Tanya: That is too rough of a word, I am just a bit mentally unsane.