If Pietro hadn't been kissing him, it was likely that a string of curses would have come out of his mouth. It hurt at first, a lot, but he seemed to adjust and then it simply felt amazing. Dom had had men inside him before, but never inside him. It wasn't comparable. He was finally getting the other side of the story.
Dom tried to keep breathing, but it was nearly impossible. His head came to rest on Pietro's shoulder, his breathing just as ragged and short as Pietro's.
Dom eventually got the rhytmn and eventually discovered what felt good and what felt better. He shifted slightly in Pietro's arms and his grip tightened, if only slightly.
"Don't be gentle with me," Dom ordered, and although if Pietro was being completely natural, he'd probably break Dom, but he knew the other man would know what he meant.