I'm uncircumcised, and after a round of sex, the foreskin will be a little sore, sometimes sore enough that I can't motivate for a second round. It kinda feels like my penis has been beat up. After the second round, I'm done, as it's too sore to consider another round for at least 8 hours or more (overnight). I know it's not simply a long refractory period because using a vibrator I have reached orgasm with ejaculation five times over a few hours. Any other uncut guys experience this? Any tips?