how do i tell him??

how do i tell my husband i want to do more kinky stuff in the bedroom? we’ve always had very vanilla sex and he’s never been into teasing me or anything like that and that’s literally all i want!! he knows i’m the sub but he doesn’t know to what extent (i’m talking hard-core). i want to try new things with him but i don’t know where to start or even how to bring it up to him in the first place without him thinking i’m some sort of freak. please help!!!