What is my rooster doing to my hand?

[Shadrach]

This is Merlin; a little background:

I've never kept roosters before, but have decided to start breeding..

Merlin was hatched by me.. and I handle my chickens daily.

He's always been a lover boy.. when he sees me coming he does his little circle strut dance and I always pick him up for some snuggles.

Well 3 days ago he started grabbing my hand like this.. I thought maybe he was trying to mount me/mate me but after googling it looks like it could also be aggression?

Although google doesn't know him I'm hoping some here can help.

He's never been aggressive before, in fact quite the opposite... so what is this? How do I correct it? Should I be worried? Or is he in fact.. in love with me...? Thanks everyone!

Looking at the second picture it looks like he's wiggling hs rear end given his head is in focus but his rear end isn't(?)

From what I can tell he's trying to mate. Some young cockerels will try and mate a rock. It's not aggression but sometimes it leads to aggression because the keeper rejects the cockerels advances, or even worse, responds in an aggressive manner.

If you want to find out, then leave your hand flat on the ground and see what he does.

This is Treacle having sex with my boot.

I let them get on with it, but I don't offer my hand to young cockerels thus inclined.
I've had a few that did this and they grow out of it once they've attracted hens of their own.