It's funny how checking out girls has totally changed for me semi-recently. Whenever I see a new attractive girl around I instantly judge her based on as many observations as I can make without taking too long and being creepy.
Personally, even though it's quickly become a natural progress, it's odd that my eyes go: hair, legs, face, ring-finger. It's funny that no matter how attractive I may think a woman I meet is, I'm almost completely distracted until I can get a glimpse of that certain finger. To be honest, it makes me a little sick to think that, even though I'm only 23, I have to make sure women aren't married before I try to talk to them. It's a little frustrating.