Documentaries on Unusual/Odd/Cringy Subjects -

The Vicar

Why yes, I will have some more tea.
Here's an unusual documentary from 2008: "My Car is My Lover":

It explores the lives of Edward and Jordan, who are mechaphiles (ie people who have sex with cars)

Jordan is actually fairly normal (apart from the car-fucking thing, which he does in private), but Edward (who's a furry if you watch carefully) is a total creeper, getting obviously aroused at a car show and sneaking around hotel car parks at night to jerk off on the vehicles.