Mike can't think of anything other than wanting to please Liam at this state--partially because he loves him, or he thinks he loves him, but also because he knows what will happen if he doesn't. The drugs aren't the biggest problem: Liam is, very much, even worse.

That hand curls around his cock and strokes and every single moment of doubt leaves, dissipating through every touch, and Mike already finds himself panting. "Yes, sir," He mumbles, and it's barely audible because he's far too focused on how good it feels.

This is what can happen when he behaves. This is what he can look forward to after every thing Liam does. His reward.

It never occurs to him that this has been taught. It never even occurs to him that he'd considered himself straight before all of this. All that mattered was keeping Liam happy and those hands still on his dick.