The noise of interest that came out of Tony when Steve bit at his neck was somewhere between filthy and embarrassing and he had to duck his head and laugh at his own ridiculousness before things got too out of hand. There'd be time for that later.
Maybe sooner rather than later, if Steve stripping naked had any say in the matter. Which, in Tony's brain, it definitely did.
He stood too, shucking off too-loose jeans and boxers in one go, leaving the mess of clothes behind in the sand next to the coconut before watching Steve (and his perfect ass) moving into the water. It was a very nice sight. One he was going to commit to memory.
When Steve offered that hand, Tony moved before even really thinking about it to take it. "Slow," he said, because while the water was not cold, and he did not mind it around his ankles, shins, and eventually knees, he was cautious. It used to be worse, years ago. So much worse. Maybe it was time that made him able to face water nearly properly again, or maybe it was that there were newer, fresher horrors that took this one's place. Tony didn't really care which one it was. It didn't matter anyway, not when he pulled Steve closer in order to kiss him.