As a bottom (vers, primarily bottom), douching is an important part of my preparation for a sexual encounter. Unfortunately, realizing you're gay doesn't come with an instruction manual, so it has taken me years to learn how to properly douche. I guess that, in a lot of the encounters I've had prior to learning how to properly douche, I was lucky with my natural bodily cleansing (or with very understanding tops).
To do my part in remedying this, I've prepared a video on basic douching:
I hope that you, dear reader, find the video useful (or that you already know how to douche).