Hi-- Yes, I agree with diaspoguy. I used to have the same thing happen to me me, until I figured out that I should empty my bladder prior to having sex--even if you don't feel like you have to "go", try to anyway. That should solve your issue.
As for having to force urination right after ejaculating, your body has to relax the sphincter below the bladder to allow urine to pass through. (This sphincter prevents urine from escaping when you ejaculate and also prevents semen form shooting backward into the bladder). If this ever happens again, wait a few minutes (say 5) after ejaculating before trying to urinate. I've been in the same situation--I can stand there for two minutes urinating a trickle because that sphincter has not completely relaxed yet to allow a full flow. The burning you feel (unless there is something else going on) is normal as your urethra is still very sensitive after ejaculating. Hope this helps!
Pain with urination after sex can be common if you have a full bladder during sex or masturbation. Try emptying your bladder right before that. Another possible cause occurs if you stay in high arousal for a long period of time prior to ejaculating.
However continual or frequent pain with urination usually might signify a urinary tract infection. Check with your Dr. if this issue persists.
I am not sure if its normal. but, I to have to urinate after ejaculation. it does some time burn a little. I have not really paid much concern to it. My wife goes to the toilet after sex too.
I don't think its anything to worry about
PS: I have a burning sensation
Sorry I don't know how to edit my post
Just to say that it is a little bit painful to urinate in those moment, I have to force really hard to urinate a very little amount of urine.