It’s said Boris Johnson us sex-obsessed. It seems so!
For those who are not in the know, “onanism” is used to describe either masturbation or withdrawal before ejaculation.

and if you are not convinced:

or this:

Read more here:
https://inews.co.uk/opinion/from-onanism-to-spaffing-boris-johnsons-obsession-with-masturbation-is-revolting-and-pathetic-996097