Saw the same thing. R/politics is a great tool to gauge where they are trying to steer public opinion, and often reveals next moves. My guess there are competing comment farms and that there is some government faction that wants to replace Joe. But others want him to stay put because they fear they won’t have as much power under a living president.
I am not of the penised persuasion, and my brain does the same thing OPs does. Women can also have “wet dreams”, like I wake up with the sort of tender, ticklish feeling of having had an orgasm recently.
I think maybe the brain just wants to send blood there periodically particularly in the morning when everybody has testosterone spikes, relatively speaking.