WARNING: NSFW POST

I'm laughing at myself for never replying to this, I had every opportunity to do so but just... never did? I am afraid anon, that my headcanon cannot agree with this sexy scenario,,, very autistic of me but I tried to make it work but I just couldn't LOL but lemme try and explain my thoughts in a sexy-ish way <3

In my mind, Gw is just too sub to loose control. I feel like if he did he would start sobbing and recede into himself, like he would be harsh on himself, so in that scenario I just think if anything Mttw would end up taking more control and being more present. I don't think Mttw would turn into an incoherent mess, I think he would softly caress Gw's face and tell him that it's okay, that he's being a good boy and he's making him feel so so good and that it's alright to let go. That would be how Gw would then be able to kinda go a bit sex crazy and unstoppable, he'd need to be told that it's okay and it's what Mttw wants - otherwise he would hold himself back as much as possible. Gw is very much a gentle giant, who tries to be as considerate of others as possible so there's nothing he would hate more than misbehaving if he was really serious about something (this isn't to say he wouldn't misbehave on purpose to get a reaction out of Mttw, but he wouldn't do so by accident). I think Gw would sulk for a little while after until Mttw was able to get him to come round and make a joke of how much he cries during sex, and only then would he get a punishment (which would most likely be a treat anyways, lbr).

So those are my thoughts on this specific scenario - sorry they don't match yours entirely but regardless I hope you find them interesting! <3