Your post would make sense in a world completely devoid of communicable diseases and pregnancies.
When you find that kind of world repeat your post and the people in it won’t have to correct you.
We don’t have any business entering into other people’s privacy along these lines.
I do not approve of it, but we do not know what arrangements have been made between these men/women and their spouses.
The spouses at home may be doing the same thing by other means.
That is between them, not do gooder folks who have no business getting involved.