His responses when sobER may well be the best indicator. Make sure he knows how much you like having both holes filled. Ask again when sober if he would like to see or feel the DP? If you can handle another woman to please him might lead to reciprocation.
I’ve been drunk exactly once in my life, and it was the worst sexual experience I ever had. My advice is to consider what you want while you are sober, then do it when you are sober.