let's get some serious kink going on in this kink meme, people!
maybe they get themselves in a situation where one of them needs to relieve himself but can't, and finds he's really turned on by it, or maybe it's straight up watersports where Matt gets off on the humiliation and degradation aspect of it (up to you whether Foggy is totally on board or a little reluctant but willing to do it because it's what Matt wants/needs)
Matt/Foggy, watersports or desperation
maybe they get themselves in a situation where one of them needs to relieve himself but can't, and finds he's really turned on by it, or maybe it's straight up watersports where Matt gets off on the humiliation and degradation aspect of it (up to you whether Foggy is totally on board or a little reluctant but willing to do it because it's what Matt wants/needs)