How to control sexual emotion

The fist step I took to stop accepting my heart's proposal which always get me into trouble was, what will happen to my body, if I refuse to obey my heart? Nothing actually, instead, the heart will be the one to be burned from inside. That is how I got to know that, what is burning me, is for me You can't be part of me and then hurt me. if your heart is helping you, then why is your body getting hurt?