This is really embarassing but here goes..........i was alone one night and went to a porn website. I was watching solo male masterbation. I was so into it that I strained my hip! It hurt for 3 months before I went to the doctor. I told him I injured it exercising. He took a hip xray and there is injury to the right hip!!!! It still hurts to this day! Have you ever heard of such a thing????? There is only one person who knows this.