Sub woman married to a vanilla man

Let me start by saying that I LOVE MY HUSBAND AND AN OPEN MARRIAGE OR TRYING A THREESOME IS NOT AN OPTION. But...

I am a hardcore sub. Sometimes, I just really want to be tied, teased, gagged, spanked, hair pulled, punished, choked, and called names in the bedroom.

Meanwhile he, a sensitive and loving man, hates that he could hurt me or go too far, and sex is usually quick and vanilla. He always makes me cum and is super gentle, which I love, but sometimes I just want to be...ravished. I've tried telling him how I need this, how I crave it, etc. but he is so scared to try it.

How do I convince him to just... let loose?