ok so me and my girlfriend had sex for the first time and we both had jitters but while we where having sex like 8 min later i had this weird feeling i know i had it before while masturbating, But i can't remember if its me ejaculating or be aroused. so while i was going i had this feeling where it felt like the blood ran up my penis to my head back down. And usually if i ejaculate i have to pee right away and my penis shrinks right away but it didn't happen and it doesn't really seem like a ejaculated because i kept getting boners afterwards. i heard its called something like the rope effect