Butt foreplay??

My male partner loves going down on me and he asked if it would be weird if he kissed my butthole (I think he asked cause I told him in the beginning I'm not ever going to do anal sex) but he was like well I hear women rappers talking about how it feels good when a guy eats their booty. Basically wondering if he could try it on me. I didn't really know how to react I'm so weird like when he tries to go down on me Im so worried about if it's clean or smells bad down there. What do y'all do