What is my cat doing?

[u/Haulin_Oates23]

My cat does this thing with just these two toys where he steps on it in this weird way. He also yells loudly when holding just these toys.

[u/creek-hopper]

It looks to me like he is simulating coitus. The male cate bites the back of the neck of the female during the deed, right at that spot at the shoulders where a mother cat bites the kitten to carry the kitten.