If someone lost like 70lbs and consuming 1200 calories a day as his diet.
What can he do after he reaches his goal weight, so he doesn’t gain the weight he lost back?

I been the same weight for the past 4-5yrs, im 17yrs old and weight about 98lbs. Im trying to gain weight , also want that weight to focus on the breast size and butt im a 34B. My mother and sister are both big breasted so i know mine can get bigger. I have a small body frame I am 5'2 tall. I cant seem to follow regualr gain weight diets cuz i get full really fast so everytime time im hungry every couple hours i grabe a healthy snack such as a granola bar or if i want a a meal, i make spagahetti or eat chicken. Ive also been chewing my food alot more till its like soup and eating more slowly, i just started this the 10th of october so i know it hasnt been that long but if i keep doing this, should my breasts and butt size get bigger? (I also do exercise and work out every now in then n gym) P.S. Is it true your breasts can get bigger if you eat b4 you go to sleep and sleep without your bra on? Just a rumor i heard, My goal weight is 110-115lbs. I want to increase breasts/ butt size!