Hi Bratty
It sounds like you could benefit from a massage of the prostate gland, which is located up your anus behind your balls.
This is where the pent up semen is stored.
I have read that if the gland is expertly massaged, the semen can be made to dribble out of the soft penis in quite surprisingly large quantities, thereby relieving the pressure you are feeling and denying the orgasm and the pleasure of having your penis touched.
The process is generally referred to as "miilking" .
It is something i would like to experience.
Good luck with your orgasm denial. Is your Mistress using a chastity device? If so which one?
i have a CB2K but find that it chafes on my scrotum and falls off after a couple of days.
How long can you go without cumming?