Sex as it was understood then is not as it is now. There’s a lot of different ways to explain that verse but I’m choosing to use the most vulgar and explicit because this argue truly angers me and I need to finish it quickly before I begin saying un-Christian things.

Ancient understanding of sex: the person being penetrated is nothing but an object, a receptacle for my frustrations and seed. Nothing but an otherwise useless Cum rag if you will. Leviticus 18:22; Don’t treat men like useless cum rags.

There are other, cleaner and more complicated arguments to be used, but you wouldn’t listen to them so I have to resort to the most clear and vulgar one. Sex (of any kind) is only a sin if you view it as one partner being gratified by another person who is objectified and used.