"I love cunnilingus. Seriously. And if I get it first, it relaxes me SOOOO much and I come SOOOO hard. Then he can pretty much have his way with me."
"Going down is a really personal act. If I let him, he is really 'in' with me."
"I like when he does it, but I like knowing that he wants to. That he wants to taste me is such a turn-on."
"I want his tongue on me, in me, circling me. Hang on. I have to go lol"

If she allows him to put his tongue in the Holiest of Holies, he better not only value it, he needs to know what he's doing—which actually means: How does she like it, when, and how often. 

Oral sex is a special level of intimacy. It creates a trust when you allow someone to experience your body so closely. And, that trust and allowance can provide for incredible physical and mental release and pleasure. 

Bottom line: Go down. (What else is there to say?)