Strange experience

my boyfriend was drinking with his friends one night and when he came home we became intimate,however his penis kept going down after awhile and i had to ask him if he had ejaculated and he said no so we kept going. To my surprise my boyfriend started to urinate on me thinking he was ejaculating and this was real urine i would like to know what's the cause of him urinating instead of ejaculating?

[remar]

It sounds like your boyfriend just got way too drunk. The alcohol could defiantly keep him from getting an erection.  

[Flavoured]

I agree with remar, it seems he was completely hammered, and if it's a one off occurrence, there shouldn't be any cause for concern. And being too drunk can cause erectile dysfunction.

[John987]

Excessive alcohol explains all of it. Some inebriated people can converse reasonably well while their motor skills are severely impaired .