You mean like in a serious manner, or a joking manner?
If he's serious, it doesn't really sound like this is a person you can trust. But also consider this: we live in a society where people generally don't want to know what happens behind closed doors, especially when it involves a fetish like this. More than likely, if he told someone, they would just say, "Dude, I didn't need to know that…"
Also consider that you could deny it.