My biggest insecurity would be certain aspects about my body. I have an abnormally large amount of body hair. I'm sure someone reading this understands, but I sometimes I feel very alone in this. Once though, I was watching the Jimmy Kimmel Show and his girlfriend (or ex-girlfriend?) was on it, and she mentioned that she had a lot of body hair but said that Jimmy had said to her that it just means she has a lot of testosterone and therefore likes sex more. I just hope my husband thinks that's a fair trade-off.