When I was younger and first discovered sex I put a pillow between my legs and started moving back in forth and it felt good so I kept doing it and then after a while I got this tingling sensation down there and it made me feel some type of way. Back then I didn't realize I was humping my pillow.. I still do it now occasionally and watch porn, is this a form of masterbation? And is that tingling sensation an orgasm? I need more feedback and am I the only one that's done this???