I see no issue with it.
over the years, Ive had experience with a casual fwb. we met on a site, got along but had no emotional connect. physically we bonded well. When we were both single but horny we hooked up. it was safe play with someone trusted, on terms we both agreed to.
terms being feelings that may arise are brought up and discussed- if unreciprocatedwe would stop the arrangemen. If either of us was seeing another person sexually we also told each other to maintain a level of safety. once a new partner was beyond just sex we stopped our relations.
he's married now though....so im here lol