Husband used to be a sub

Me and my husband got married pretty quickly. We were married in 6 months because I got pregnant but we lost that baby and I've struggled to get pregnant since. So me and my husband married quickly and are still learning new things about each other. Our sex life is decent. We also have the type of relationship where can talk about ex's and sex life with ex's. I know some may find that weird but if there's something we can do to improve our sex life sometimes talking about what worked with other people can help.

Me and the hubs were recently talking about kinky stuff and he told me he was once in a bdsm relationship. I thought he was a Dom but he actually told me he used to be a sub and was in a relationship with a dominatrix. I found that interesting and I asked was that something he was open to. He said sure but he hasn't been one in a while. I guess I just don't know how to dominate a man. I know my husband does enjoy butt stuff because Ive done that to him before and he liked it. But I still don't know how to be dominant

@A I like the idea of being a Dom. Feels empowering. I just don't know what to do or how to be.