What happens if a man takes birth control?

Answer 1

Birth Control has the hormones, estrogen and progesterone. Since men have a low amount of these hormones, the addition of these hormones can produce... feminine qualities. If taken long enough, men can develop breast size increase, etc.

Men sometimes actually take estrogen to decrease their prostate size or increase libido and other reasons.

When a man wants to change his sex, they actually have to go through a year of hormone treatment in order to prepare them for the operation.