Wheatley would not reach the same fame as the sexymen that would come later, but he was still given the original sexyman treatment. He was given a universally accepted humanized form so that Tumblr users could feel okay about wanting to fuck a robot—a skinny white man with blonde hair and glasses. My thoughts on Wheatley himself? None, he seems cool, I guess. My thoughts on him being a sexyman? I hate it.
It's… pretty involved, but it eventually turns out that the key to being a sexyman is not to be sexy at all—which is great news for me—and Reigen was brought low by his conventional attractiveness.
Ubiquitous on 2010s-era Tumblr, Sexymen are defined by their ability to inspire standalone fandoms. They range from mainstream figures (Marvel’s Loki) to characters whose appeal would baffle outside spectators (a talking clock; a pixelated skeleton; a Minecraft creepypasta entity). The more abstract Sexymen are sometimes redesigned by fan artists to resemble skinny white guys, echoing the most notorious Sexyman of all: The Once-ler from the 2012 Dr. Seuss movie The Lorax.
The Tumblr Sexyman is believed to have started with the release of the Lorax movie, according to The Mary Sue. Their article on Tumblr Sexymen says that what makes a character a sexyman lies between being evil or a series of unique traits that separate them from being “normal”.