Even though I'm thin, i've big fatty Butt and it wag while walking. Due to this I'm feeling embarrassed in public and in friends circle. Two year ago I didn't have this. I think it could have become fat after I ran 6-8 km for 7 months regularly last year. ?I started sleeping with folded legs ?.I started masturbation (Rubbing) over the pillow. Please mention weather the above reasons are true or not. And please suggest me how can I reduce this Fatty Butt to a normal one.