"I don't find the idea of wearing a romper that weird. I grew up around motorcycles and cars, and we called what we wore overalls..."

"... but it's the same single piece idea as a romper. I also wear a one-piece when I do competitive road cycling.... It feels easy,...

"... but it's the same single piece idea as a romper. I also wear a one-piece when I do competitive road cycling.... It feels easy, and you're not messing around with it every time you sit down. It lays how it lays, and that's it."

Said Shom, one of "5 Real Guys" who test-wore the male romper for Esquire. Shom recommended it: "One hundred percent. Especially the one I'm wearing—I would seek this one out. Actually, where did you get it?"

Guy #2 said: "Damn! This isn't nearly as bad as I thought it would be. Actually... this is a solid look. A classic mechanic's suit...."

Guy #3 said also compared it to "a mechanic's jumpsuit," but didn't like the "dropped crotch"* and didn't recommend it: "Absolutely not. Under no circumstance could I, in good conscience, recommend anybody wear a romper at any point."

Guy #4, who was the only one given a pink romper, didn't mention the pinkness, but said: "It's an interesting feel because there's nothing on your waist. You feel a little naked, actually. I understand why women would enjoy it—it feels pretty good and breezy. Outside of the breeziness, the really low crotch is not great."

Guy #5, the only one who got a print (and it was a loud, fruity** print), liked it: "I felt like a little kid. It really brings out a lot of playful attitude." But he liked looking like a child — "I'd also recommend a regular onesie. I'd also recommend Crocs. Why not? And pinwheel hats." — so he's exactly what I've been talking about all these years about men in shorts: It makes them look like little boys. If that's the look you want, you've got it.
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* Technically — and this is my observation — the crotch has to be really low because the entire thing is pulled up by the shoulders. If you lift your arms up or bend your torso forward, the whole thing is going to go up. Men's clothing is normally broken up at the waist, so the parts operate independently. If you make it one continuous piece, you're going to need to account for all the movement of the upper body. This is why dresses make more sense as a one-piece garment: The crotch is out of the action.

** Pineapples.

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ADDED: The word "romper" to refer to the child's garment goes back as far as 1902, according to the OED.  The word is used for an adult garment, beginning in 1922, and not always for something worn by women. The OED has a definition: "(a) a fashionable, loose-fitting woman's garment combining esp. a short-sleeved or sleeveless top and wide-legged shorts; (b) (U.S.) a style of loose-fitting men's breeches or knickerbockers (now rare); (c) (Brit. Services' slang) any of several styles of military uniform; (d) a light one-piece garment allowing easy movement of the limbs, worn as sports clothing." Many of the historical quotes relate to men (but always with an "s"):

1941 Amer. Speech 16 186/2 [British Army slang] Rompers, battle dress.
1943 ‘T. Dudley-Gordon’ Coastal Command 85 Sipping hot coffee as he took off his rompers (combined parachute harness and Mae West life-jacket) he told us of his first night raid.
1954 H. Macmillan Diary 24 Aug. (2003) 346, I left the F.O. at noon and arrived for luncheon at Chartwell just after 1pm. P.M. was in bed—so I had to wait 20 minutes till he had got up and put on his ‘rompers’....
1990 D. Jablonsky Churchill, Great Game & Total War 145 In 15 minutes, Churchill, dressed in his ‘rompers’ was in the Intelligence Operations Room outlining his intelligence requirements.

Churchill.