TITS TASTING LIKE MILK??

Okay so i'm sexually active and what not and my boyfriend , a while back , told me that my nipples tasted like dry milk . I started freaking out and about a day later he told me he was just playing . so i was calm and i guess he told me that so i wouldnt be stressed . it's been like two months since this happened ( i have had my period both time on schedule) and now he told me that he wasn't playing. and he's being serious. why would my boobs taste like milk??? someone help 😅