Hello Friend, Good that you are seeking a help here. Such thoughts are quite normal among your age group, but only thing, it should not be overdone as it will make you defocus studies, career and get you into unwanted relationships. Definetily, you should have a control over this. Sometimes hormonal imbalance or body heat also influence in  driving such thoughts. No worries, there are few home remedies, dietary and exercise especially from yoga can help you in controlling this. You may need a little counseling support. Don't hesitate and you can reach me online for further guidance.

You need proper Counselling. Consult me online.