Obviously if you want to avoid being bitten, you avoid an animal's mouth. Just like if you don't want to be lewded, you avoid a waifu's mouth.

Don't avoid a waifu's mouth.

Let me translate

Demencia: Black Hat!!
Black Hat: Stop now annoying girl! (Pinche is a way the old Spanish people say annoying, and chamaca is another way to say girl in spanish)
(Black Hat covers Demencia mouth with his hand)
(Demencia (sexually) licks Black Hat's hand)
Black Hat: Disgusting!