My husband says I’m acidic down there?

I’ve never had anyone in my past tell me this before. My paps always come back normal. I don’t have any infections or anything. i had a pap and std testing last month. Both came back clear. But my husband always complains that after sex he feels a tingling/almost burning sensation and says it’s bc I’m acidic? I haven’t heard anything like this before. If what he’s saying is true how do I fix it?

He says he’s never had that with anyone else and that there’s something wrong with me. So I don’t know if what he’s saying is true or if he’s being a jerk