Well, seeing the shape of a strigil, that makes sense. Being curved and having a vessel-like cavity makes no sense otherwise. A straight, flat blade would have done just as well. But saving the sweaty perspirations of a major gladiatorial battle would be quite the souvenir for wealthy Roman women.
The gladiators, or their owners’ probably sold it at a premium price..........................
“Better to have your brother scrape your back.” — Tiberius [George Baker — I, Claudius (1976)]