For
Honesty builds trust and avoids future drama.
Against
Some past events are private and not relevant.
Anonymous excerpts, translated where noted.
“Yes, it is useful. I won't want to have a relationship with someone who killed a dog”
“As an insecure and conscious person, I like to know about the past of those I interact with.”
“knowing numbers, how many you kissed, how many you had sex with, I think all of this is completely irrelevant”
“I don't see my past as something negative or relevant to our relationship”