First of all, how do you spike your own drink?
Now, I have thought about this... obviously... and, surely, there needs to be an element of surprise to spiking one's drink or what's the point? Did he put the shit in his drink and then forget, and then was surprised? That would certainly qualify as a "whoa, what the hell is going on here" trip by which time you've moved onto getting yourself off. And how long after that is it you trip into methodical mode and ensure you take yourself off home safely - you know, in case there's any weirdos about? "
He didn't spike his own drink. Well, he did only not in the traditional sense. He used it as an experiment to accelerate some rather unusual sexual tendencies and if caught, could blame his outer ego (or inner child, or multiple personalities) for "making him do it." They have to start somewhere, right?
What is worrisome is, where to from here?