“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”
What does being alone hafta do with swimming. Their 2 totaly different things.
There are somethings you can do with yur wife that you cant do with anyone else, but you cant do everything. Just like theres no acception for all the other things I said so too theres no acception for mixed swimming.