urinated instead of ejaculation

My 45 y/o boyfriend of 6 years had a problem that upset me.  While performing oral sex on him, instead of coming he started urinating.  He wasn't aware until I pull away and he continued to urinate on the wall.  I was very upset as I had a mouth full of urine.  He said this has never happened to him, What could have caused this.  This might very well ruin our sex life.  I am very upset about.
I have never heard of this happening.
Please help

Thanks

[Kevin Pho, MD]

Sometimes orgasm can be associated with spasms or relaxation that can lead to urination.  I would suggest having sex with an empty bladder if this is a concern.

If this symptom continues, obtaining lower GU testing (i.e. a cystoscopy) can be considered.

I would have him discuss this with his personal urologist.

Followup with your personal physician is essential.

This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.

Kevin, M.D.
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