When is the right time to tell a boyfriend about your abusive past? Do you need to share that information?

Anonymous
I have a dark past of abusing younger kids and beating animals weaker than me as a child myself. I once told my child psychologist ''I like hurting little kids weaker than me, mainly little boys''. I've served my time (I got placed at a mental health institute) for my actions back then and got helped too.

Eventually I realized it was a reaction towards years of abuse and torment. I even got pregnant for a short time but a miscarriage happened after I tripped. I had barely turned 11 at the time but my body (in both height and weight) had already matured earlier.

I'm not in a relationship yet but when I have a boyfriend, is this something I need to share with him? If so, after how long in the relationship? Or should I keep it to myself? Would you want to know about it?
Updates
+1 y
This is going to sounds mean but at the time when I had the miscarriage, I really hated the baby and was happy he/she died. I kept asking if that thing was removed from me. I kept referring to the baby as ''that thing''.
Now as an adult, seldom times I think about him/her, about what they would've looked like if I never had that fall. He/she would've been 9 years old by now.
When is the right time to tell a boyfriend about your abusive past? Do you need to share that information?
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