My husband only knows cuz I had to tell the anesthesiologist before my surgery a few weeks ago. I know it's only a number, but when it reflects how you feel about yourself, then it's more. Like if I weighed xxx but looked great, that's fine, but if I weighed xxx and look like hell, then that is NOT fine. And that's how I feel. I don't feel good or feel like I look good, so the number DOES matter in that way. My number may not be bad for someone else and their number may not be bad for me, but I know that right now my number is bad for me.
Oh and the other main reason that he never knew, is b/c I rarely weigh myself. I try to base my health more on how I look and feel and how my clothes fit then what the scale says. And the fact that I am 5'2 and Matt is like 5'5-5'6. So we are almost the same size and I feel like a big monster compared to him sometimes. So I keep that nmber to myself as much as I can.
But he does know my bra, shoe, ring, shirt, dress, underwear, etc. sizes!