When I was young being called a sissy was not nice to be called. I had been called that or girly at times, even had a gym coach call me Suzie once, I guess to shame me, I didn't think I was projecting that. I don't think I ever really thought about that at the time. The whole idea of Gender Dysphoria was not yet out there.
Once got pushed into a fight, and he said "even fights like a girl". Sometimes our childhood is something we have to survive.