How do I approach having a girl lick my ass

[Ba****]

I’m going to remind some (one) commenters of the consent acronym FRIES - freely given, reversible, informed, enthusiastic, specific.

All acts, regardless how extreme or not they are must be discussed ahead of time. No exceptions. Some people might be totally fine with anal but not vaginal intercourse. If you “just move into position” without prior discussion, you do not have consent and you put yourself at risk of ending up on a register.

Good, safe, experienced submissives know you don’t add in something unknown mid play, so they won’t entertain this level of fuckwittery.

OP, please do not follow DaddyOwns’ advice. It is terrible.