They can be handsome in different ways but most good looking guys (if not all) have a low brow, jawline, cheekbones. Think of Tom Cruise, Brad Pitt, Clooney. It's really obvious and not rocket science, noticeable in a split second.
http://www.dailymail.co.uk/femail/a...are-chin-prominent-brow-suggest-cheating.html
Getting laid is also no indicator of attractiveness unless you can pull hot girls in real life. I have a below average tall friend who has slept with a fair number of women online, but it means nothing as he is playing the numbers game and attracting his looks match. In real life, he gets close to zero attention except sometimes from his looks match. Even that is rare. Women also make compromises don't forget. Also he can't hold down relationships and leave him eventually.
I guarantee, everyone on this forum can get laid. Those that haven't, have mental issues most likely which they need to address. True ugliness is rare and most the "incels" I have seen on here could lead a normal sex life.