it's "salty" ?!?

Bri
Sooo about a week ago, my boyfriend went down on me for the first time (his first time not mine) and after a couple strokes he came up, made a face, and commented on how it "tastes salty"!! I mean, I laughed it off and he kept going but it made me quite discouraged :/ I get that it was his first time going down on a girl but there are just some things you just know not to say😭especially at a time like that. I usually tell him now that he doesn't have to keep going (although, he does) But now, I just feel super self conscious for the next time he will. I've never felt like this before, self conscious about my body, and my sexuality. I feel sexier when i do things to him, and not the other way around...any advice? 
-Bri xx