Metallic taste

The other day my boyfriend went down on me and he said it tasted metallic??? No one has ever ate me out before and I was nervous. He thinks it’s fine but it’s too it supposed to taste different??

I know that people say eating pineapple makes you sweeter or what but I don’t like pineapple. My diet is pretty average otherwise

I just wanna know if this is normal

EDIT

I’m not on my period, about to start, or just getting done with my period

I am ovulating if that means anything though