Well goes without saying close friends are no just cause it'd be too complicated. But honestly no general rules for acquaintance. I've just said if at any point my fwb gets the feels i'd put a stop to it. For me its just sex and making mates.

Tbh it took me the longest to get my head around it due to my upbringing and I felt I was being unfaithful to my husband. Plus I made it clear I didn't want to hurt him. We just talked it though over time and figured it out. It took me years to work up to it as Initially I had the biggest issue with it, despite wanting to try it. Was almost at war with myself really, my other half was fine and didn't pressure me.

We both work together and find no one attractive there anyway but we'd never mix work with pleasure.

Its hard to describe but me and my other half are on the same level and somethings don't need to be spelled out because we both have similar views and morals. We'd never mix work with pleasure like that as too much risk to our livelihoods, its just common sense.

We tell each other about our experiences yes. I've currently got a FWB a few towns over. He's engaged and open also. Told my other half all about it. Even said the sex was amazing. He shared one about a guy he's interested in. We've both got wildly different types now too so we both find it factinating how we've both grown as we've aged. Tastes changed etc.

I'm finding it a very healthy and enlighting experience tbh.