“Are you curious abotu where it says its assur to eat pork with yur wife? Or say loshon hara with yur wife? Or wear shatnez with yur wife? It doesnt say it becuz its assur all the time. So is mixed swimming. It doesnt matter if yur wife is with you or not.”
Um, yeah. Now that’s just silly, comparing apples and oranges! Yes, it’s assur to eat pork with your wife. You can’t eat pork with anyone (“I will not eat them in a boat. I will not eat them with a goat”), but you are allowed to be home alone together with your wife, which is something that you can’t do with other women because of yichud. You are allowed to be alone with your mother and sisters just like you’re allowed to swim with them (unless you’ve decided that that’s assur too, and if you do I’d like to see sources for all this mishegass of yours), so why can’t you swim with your wife?
And please, learn how to spell! (Unless spelling properly in English is not something approved by the rabbonim…)