Reading
this thread got me to thinking about a bigger question.
If you (or your wife) got pregnant and you had been swinging, would you want to know if it was yours or someone elses? Or would you just assume it was yours. Would you have paternity testing done on the child? If so, and the child turned out to be fathered by someone you had swung with, would you tell them? What, if anything, would you expect from them?