Song of Solomon 7:9 (ESV)

9 and your mouth like the best wine. It goes down smoothly for my beloved, gliding over lips and teeth.

The man may kiss his wife in such a way that they feel the inside of each other’s mouths. This is something that is allowed to be shared between husband and wife. The man longs for the intimacy with his wife. He wants to taste her in the same way you taste a good wine.