For the girls out there that have no issues with your weight, I applauded you. For the rest of the girl population who have issues with their weight the following rules apply:
Fat rolls, love handles, etc. are off limits. They are not play toys. Do not grab, poke, play with, etc. Do not make comments like, “More cushion for the pushin’”, “big girls need love too”, “fat a**”, etc. She can make comments like that about herself, but you can’t. Never say these things to her face or to anyone who would go back and tell her.
Always make sure to say things like, “You are beautiful just the way you are”, “I love you just the way you are”, etc.
If her weight is starting to become a health issue, than the topic needs to be approached positively, respectively, and tactfully. Say things like, “I love you and I want to be with you forever and I am scared I’m going to lose you too soon. Please, for us, consider getting help. I am here for you and I will help and support you.”
If she is making an effort, do not eat things in front of her that she cannot have and do not bring things she cannot have into her house. When she exercises, do not make rude comments, even in jokes, about her being gross, sweaty, smelly, etc. She will abandon everything, thinking it is not worth it.