Really? I find this difficult to believe but I suppose I can be projecting my own bias. Jealousy causing break up even among poly-partners is notorious I think. Where do you get your information, I'm curious?
Back in the day when parties were common I had this discussion with many sps. Some more single Some dating some married. Some later married clients.
Some how the secret life Others were open.
I dated a girl And found out she worked here. She was secret at 1st and open later.
I imagine there are million of varistions.
If you really want to know Data There is an SP doing PHD research on the Industry. She would be the 1 to ask. She will make you do a survey though.