I know for definate he pissed on the bedroom floor because i saw him with my very own eyes! i also had to redirect him mid flow to the bathroom where he still chose an obscure method of going to the toilet choosing to go in a bucket we had in the bathroom after cleaning the floor, when the toilet was no further than one and a half metres away from the bucket.
From this i concluded the mysterious wet patch on the living room floor two weeks ago was also connected to his toilet troubles, and he did piss on my bedroom floor at university. Adam also stated the stain was not there when we got in but only appeared when he managed to pull himself out of our bath where he had chucked up most of the nights drinks and went downstairs again to find simon partially naked on our sofa.
And as for him denying it he has little ground to stand on, he can't remember anything after it happens, I actually asked his permission to take that photo and he rang me at work today to ask when said photo was taken!