Mr Rob, Drexel: scientific minds like to find out the psychology of things and worry about their own psychology when alone.
Saying "wear what ever you want" means that -no matter how fashionable you dress, if you don't know how to talk to a girl, how to flirt, how to move things forward, your clothing wont do anything to get you laid.
However, I must point out that is not the topic at hand. This topic is about how to dress nice, so I'm going to continue doing that
To start off I've found out that t-shirts tucked-out look better most of the time. Unless you have a blazer or jacket, in which case both ways look good.
(Never mind his posture though)
Now, between this two:
The guys with the shirt tucked-out, the man in the right, looks younger, the kind of guy you'd find out drinking beers and playing billiards in a party. Usually this is a relaxed attitude; goes very well with the arms of the shirt rolled.
While, Tucked-in, the one on the left, has a mature vibe, more sexy in my opinion though not more sexual like Tucked-out. This guy probably has a job.
Overall, I prefer to do tucked-in rolled-sleeves since it helps the male figure (triangle thing) stand out.
This guy knows.
Salut,
Rhyme