I had a boyfriend ask me that once. I was actually shocked. He was pretty marred from having a cheating 1st wife... my husband had cheated,a LOT, too... I made some low-ball # up, no way was l going to tell him l'd have to think about it, because l was never aware l was supposed to "keep track." This was years ago... After we broke up, l quit having boyfriends, went celibate for many years. I did think about it and tried to count, l'd had a period of where one night stands or FWB's just kinda faded into the dark recesses of my memory.