Is this strange, and if so, in a good or bad way?

My fiance and I have been together for several years. We met in high school, and when we first met (we were only friends, but we liked each other mutually for a year,) I was a bit larger, around 165 pounds, at 5'2". When we started going out, I started losing weight, and at this point, I'm around 125lbs. He hast told me, many times, that he would like it, think it was "adorable" if I gained weight again. My friend told me that she has NEVER heard anything like this before. Is it a good thing that he feels this way? Thanks.