text: i weigh about 105-110 how do i gain weight ? and dont advice me to eat because i do?   i am older than you but my weight stays between 113 and 118. at nine months pregnant i only weighed 133 and i had a seven pound boy. i ask the doctor what to do one time and she said drink a lot of milk shakes. that did not help and that also gets expensive. i started working out. i work out five days a week and also lift weights. i am still small but the working out gives your body the woman shape you are wanting. so you can weigh 110 and still have shapely legs and butt, small waist so your boobs will look bigger and from lifting weights your arms will be shapely. enjoy it. i have a lot of women jokingly tell me that i make them sick.