I want you to sit down — take a seat somewhere quiet and comfortable, where you can reflect and meditate...
...and think back. Think back to a time, say, circa 2001 — a brighter, more innocent time — when AIMing with your friends was all the rage.
Every away message featured awesome song lyrics. Perhaps you typed in purple Comic Sans, and you felt fun and kewl.
Ahh...remember this sweet, sweet moment in time?
Most importantly, though? This was a time when "LOL"...literally meant you were LAUGHING. OUT. LOUD.
A brief refresher of this forgotten moment in our history, below.
LOL: Something funny made you chuckle, IRL, out loud.
LMAO: Something funny elicited from within you a hearty laugh; a real guffaw, if you will.
LMFAO: Add on another 10 seconds of laugh time.
ROTFL: Your laughter is uncontrollable at this point.
ROTFLMAO (or some other combining-form iteration): Your laughter is so uncontrollable — maybe even painful — you actually almost fell off your chair. Your friend is effing hilarious!