i heard that having sex makes your hip and thighs thicker and your breasts bigger. is that true
No, this is not true. Sex won’t change the way your body looks, because there’s zero connection between body growth and sexual activity.
It is true that some young women start having sex around the time those changes take place. So they may think that having sex causes the changes, but it’s just coincidence.
However, pregnancy — which can result from sex — does cause changes in a woman’s body.
During pregnancy, hormones cause the breasts to approximately double in weight and size. Also, most women gain weight during pregnancy as the uterus grows to accommodate the growing fetus.