Leo is a mutant, but he's still a red eared slider mutant. Meaning he still acts like his species.

One day, he comes up to you, his bestest friend, and starts tapping your cheek. You see, he's liked you for a while, and red eared turtles use fluttering claw movements as a courtship ritual. He thought this was a silly, inconspicuous way to show his feelings since he could never say them to your face.

He continues to tap you, wanting a reaction.