The goal is to blend your sense of humor, possibly an activity or hobby or some esoteric word that in some way relates to you, and combine it all with word play that makes someone go “hmm” (in the good way, not this way) and give you a second look. : The “Cool Guys” part is boring and the rest is borderline creepy/offensive to most gals.
It’s the first thing potential dates see, and as this humorous article indicates, it makes a big impression (sometimes unintentionally).
It’s either a huge advantage, a huge disadvantage, or a missed opportunity! You can check out this link with a decent round-up of some of the very worst username strategies, but there are a lot of more mundane things that make for bad usernames.
These first ones are mainly designed with a straight guy in mind. As covered in the roundup link of bad username ideas, avoid anything sexxxxy here. The sex comes later; you can’t frontload it in a username.
You WILL get laid eventually if you come off as a human and not a sexbot troll douchebag. Life is short and there are waaaay too many dudes online you’re competing with; you’ve got to find a way to stand out a bit more than this.
These can be song lyrics, common turns of phrase, pop culture slogans, etc.