how old is your Oshi?
human memory gets fuzzy after 10 years, and completely unreliable after 35.
let's talk about human female sexuality and time:
... a conservative human female undergoes a 7 year cycle of accepting a mate. so it's plausible that past her date of virginity lost (let's cast a generous 25) every seven years she contemplates finding a new mate. unless she overcomes temptation, that's a new male at 25 years of age, 32, 39, and assuming she's sexually active after menopause, she will likely settled down with the last male. so, 3 men if she's perfect and settles down.
...if she marries young, let's say 16, 23, 30, 37 for 4 men.
...if she's a bit of an explorer she will likely play around for a few years, and have romantic affairs. the length varies, but we can average 2-4 weeks per affair. over a spring and summer of love, that's 6-12 men in a lusty, yet romantic summer. she will likely do this in her early college years and just as she enters a workforce, until she finds someone to settle with. so, either 6-60 men, depending how fast she finds a man she likes.
...what if she's a priestess of Ishtar and she just fucks? being lazy and not hardcore, she can fuck 3 guys a day easily on a weekend day. if there are 3 free weekend days for her, that's 9+ guys a weekend. 52 weeks a year, and she's in-season from 16 until , let's make it a cozy 26....that's still 4,680 men.
....on lazy mode.
now, your Oshi has led several lifetimes. likely not with other immortal men who are actually her husband at this point...right?
let's say each lifetime is easily 100 years.
if she's nice, it's 1-4 men every 100 years
if she's normal, 6-60 men every 100 years.
if she's a fighter jet, 4680 men every 100 years.
how old is your Oshi? how much fucking has she forgotten over those 100's, if not 1000's of years?