Know any wives that got pregnant by accident trying swinging once?
Is this how you're talking yourself out of giving swinging a try? No, this really isn't a thing, unless you're really careless and irresponsible.
I am sure it happened, but then she and her sex partner were both irresponsible. There are many ways to swing, and not have pregnancy being a concern.
Not personally. Myself and all of the people I know who swing practice safe se, which minimizes the chances of pregnancy as well as STDs.
It would be very irresponsible not to practice safe sex in a swing lifestyle or for that matter in any relationship in which you are not wanting a pregnancy or a STD.
I used the swings a lot when I was a little girl and never got pregnant
Yes, My wife got pregnant early on. She had a termination and after that got her tubes tied. That was over 30 years ago, and some 400 partners. God it's been fun!!!