Yea, I'm 19, straight dude, but ive tasted my own cum before. Lotsa times even.  Crazy but I frequently shoot cum that hits my face & mouth (usually not intentional, tho 2 b honest ive done it a few times  on purpose)!

You. Prob the nerves hellyea...you said he as your ex right?  LOTSA freakin mindf--k baggage that brings with it.....DEFinitely be a prime cause for 4 days of boner-kill, no joke.