If I had a FWB & expected to have or had a very sweet date with a girl I would either tell the FWB before or after the date that she is not needed. So yeah I'd rather be the guy whose relationship expectations align with the girl's expectations, rather than the guy getting strung along for treats by a girl who still wants to fuck someone else.
This isn't even theoretical, I have had a FWB situation & we both agreed beforehand that before we went on any dates we would be not fucking while going on dates with other people, because that would be unfair to the people we're dating.
If I had a FWB & expected to have or had a very sweet date with a girl I would either tell the FWB before or after the date that she is not needed. So yeah I'd rather be the guy whose relationship expectations align with the girl's expectations, rather than the guy getting strung along for treats by a girl who still wants to fuck someone else.