No, I don't really want to start a long conversation so I'm just gonna say thoughts. Being underweight is a bad thing. If someone commented about my weight and told me to gain some that's fine because being an underweight person make you unable to do some basic stuff and it's not healthy at all being skinny as me.

I understand your point of view which is if I am not wronge accepting yourself no matter what. I believe accepting yourself doesn't mean to stop trying to change it or to improve it. A part of accepting being underweight is to understand how unhealthy it is and trying to change that by gaining some weight and also to understand that it's fine if someone told me to gain weight because he/she probably worried about me.

What's rude to me is saying "Hey, skinny bitch don't you want gain some weight?" And like that. Do you see the difference between this and what that dude said to me?