Husband said he doesn't know what turns him on?

I've always known that my husband doesn't find lingerie attractive, so I asked him last night what he does find most attractive on me and he said he didn't know. He repeated told me that he doesn't know what turns him on or what he likes. He said that I'm beautiful to him and he's attracted to me but he doesn't get turned on by things I wear or anything. Advice? I have been very bothered by this and don't really know what to thing