I want my husband to fist me, but don’t know how to ask ALSO butt play questions

Okay, so my husband and I have great sex. Sometimes it’s more vanilla, but most of the time it’s toys and butt play too. He loves it when I lick his butthole and finger his butt. He’s even started letting me use a small toy in his ass. However, I want some more. I want him to fist me and I would LOVE for him to let me fuxk him with a strap on. It’s take 4 years to get where we are sexually, and only started the butt stuff on him within the last year.

Anyone have any advice on how to get him to let me go a little more extreme?

Also, in my past relationships I’ve loved smacking and spitting and peeing on me and the other guy. One man specifically was about ten years older than me and he would spit in my mouth. I miss these things and would love to try them with my husband. He is afraid to smack me, although he does a great job choking me and pulling my hair. Like, sometimes I wonder if he’s going to rip my hair out.