Some of the points you can make to him are:

Reinforce the fact that anal sex is much tighter around his penis, as the anal sphincters are more taught than that of the vagina.

It is a way for him to feel dominant, much like a more intense doggy style, which plays to his manly instincts!

He will be pleasing you more in the bedroom as there are more nerve endings in the anus and the clitoris than the vagina. Anal sex on its own can be painful or uncomfortable, however combining anal sex stimulation of the clitoris or the g spot, both of which he can have access to is much more satisfying!

You can still have sex during menstruation! 

It’s something new for you both to experience. If you are fed up with virginal sex, oral sex and if you have tried other things in the bedroom that aren’t working then this is a great way to give yourself and your partner a new sensation.

If he won’t lick you down there it could be because of the hygiene factor associated with anal sex, it is after all, the dirtiest place on the body. Why not take a shower together and encourage him to wash you around that area, while it’s the cleanest it will ever be! Shower sex is a great way to  encourage foreplay and hands can end up anywhere!