I know this is ask the gals, but I have questions which may help with appropriate answers. You say you've "never allowed yourself to cum with your partner.", have you cum while playing solo/masturbating? Do you get the same feelings of needing the bathroom when you cum then? Is it only during sex with your partner? During intercourse, fingering, or oral. Any of the three or all three? Specifics help.
When the debate is lost, slander becomes the tool of the loser. Socrates The vagina and rectum are only separated by a thin membrane. It is not uncommon for some women to have this sensation. I would ask do you have constipation? This may mean your "lower" bowels are not completely empty. Also, some women have hemorriods which also causes more pressure in that area. What we often suggest to clients that you try a different position. Female on top or side lying positions help. If your partner is on top it adds extra pressure on the digestive system and the bladder thus causes the feeling. The reason it seems to get worse during an orgasm is because your muscles are contracting. Yes, some of the muscles that are used during bowel movements. This is why some women will poop when having a baby not to mention the pressure on that area. Try to relax. If you are just going into sex without adequate foreplay and relaxation your are tensing up. That will make it more likely. Get online and research more, plus you also need to learn more about your own body. The more you know the better sex will be so find a good book and begin reading. I hope this helps...
i think this is very normal
so how about playtime with a toy with your partner and he cannot do anything but hold the toy?
just him getting you to cum..with him there..but not putting any pressure on you
and then later you relieving him for a bit
until you feel good or cum so many times you feel ok
take the "sex" part out of it and go at it like "virgins"
can you try that??
You could discuss it with your partner and tell him you'd like to just "go with it" whatever the consequences. You'll probably find there won't be any and once you've had one, you will want more. I find this a problem in anal sex when eventually I just want to go because of all the pressure.
" I don't know the question, but sex is definitely the answer"
Woody Allen