So I'm 13, I've masturbated almost a year. And well, I was on my knees on my bed one night, I stroked for about 25-30 minutes and I was ready to start to come. Well, I got up on my knees from my back and I started stroking really fast and when I came, there was a pain in the back of my knees. I felt like I pulled a muscle in my thighs and
Legs. Does anyone know what this might be because of?
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