I'd like to test various pills, creams, etc.

What is a good way to control for the porn side of things?

I could use none. But I don't think relying on my thoughts/mood at any given time is a good control. For example, when they want to compare people's MRI scans to their personality, they show each person the same movie clip, to control the stimulus.

I could watch the same porn each time. This is very controlled, but the issue here is that I'd be getting used to the same video, so I would naturally last longer each time.

I could watch a random clip each time, but then better or worse clips could have an effect on how long I last.

Does anyone have any advice on experimental design for something like this? Thanks.
> Inb4 coomer
I'm just trying to figure out the best way to get better at sex, and hopefully pass along my results to others.