**Cringe alert** my boyfriend wants me to give him a "golden shower" while he's down below !?

There have been many times what my boyfriend has given me head and in the middle I tell him I have to go to the bathroom... he says that it's just because I'm about to squirt but I don't think that's the reason because there are times I have to use it before we get started. When I tell him that I need to go to the bathroom he tells me to just "let it go". He doesn't care if I do it in his mouth because he has eaten me out on my period and also loves eating my backside... should I just go with it ?