Well that was unexpected...!
I was sat having a quick wank after my girlfriend had gone to bed last night when her dog that was sat next to me leant over and licked the end of my cock...!!
The rough tongue felt weirdly nice and instead of pushing her away, as I probably should have done, I just let her carry on.
The tickly feeling, dirtiness of it all and me already being horny made me lose control and cum in the dog's mouth! She just lapped it all up and left me a little in shock at what I'd just done!
Might have to do it again lol