<human>: Can you summarize the given text in a few sentences?

This did not happen today it did happen a couple of weeks ago

Let's begin:
A couple of weeks ago I was over at my boyfriends house. In classic horny teenager fashion we started to make out on his couch. We started to make out and were getting really into. I had removed my glasses to make kissing easier and could hardly see a thing but that didn't matter...or so I thought. Anyway I decide to go down on him and I'm getting really into it. I was really focused on what I was doing so focused that I didn't really hear him when  he said  something.  I didn't think that it would matter that I couldn't understand him (it did matter a lot) so I  take my mouth off of his, well you know, In order to give my mouth a break. I hear him groan and I look up at him. I couldn't see him very well but I do notice that his shirt is starting to get dark spots all over it. I figure out what is going on and cover his area as fast as I can with my hand. It was too late he was already covered in his own manjuice and had almost gotten some in his mouth.  I grabbed some tissues and try and help him clean up. 

Later, he tells me that he had said "I'm coming" so I could prepare myself for what was going to happen in my mouth. Oh well. We'll laugh about it one day I guess (ok maybe I'll laugh about it and he'll cringe at the thought of almost tasting his own splooge)
<bot>: Didn't hear my boyfriend when I was going down with him.  I took my mouth off and he ended up being covered in his own semen.