We were swingers in the lifestyle for over 25 years and my wife refused to use condoms from the very first time we swung. We chose carefully and found steady playmates and we never, ever, caught anything from sex with others. Random bar pickups might be a different story, but swinging and playing with married people or single men that make a one on one commitment is no more dangerous than dating. During Covid we wore masks to protect ourselves from the virus because it was so prevalent, but sexually transmitted diseases are not as prevalent nor life threatening as some other things people do, like not wearing a mask in a store during the height of Covid. There is actually no "slimmer odds each time", the laws of averages don't work like that.