The Bro Code: Like Barney Stinson says, “Bros before Hoes!” Countless PDFs of The Bro Code have been downloaded and taught a whole generation of men a code of conduct that would result in them deserving ‘the highest of fives!’ One of the many bro codes: A bro that calls ‘dibs’ first, has dibs.

The Mermaid Theory: The theory states that, over time, someone of the opposite sex, who may be as ugly as a manatee turns into a mermaid due to familiarity and lack of sexual options. Well, we can’t really decide whether this goes into the good basket or the bad basket! More like the ‘I hope this never happens to me’ basket!

Suit Up! A man in a suit has higher chances of going home happy than the one in plaid shirt and sports shoes! So bros, go to your room, change into a suit and you won’t have to be up all night to get lucky. Ask the ladies. (Psst: Versions of this include the Birthdaysuit up, Lawsuit up and Pajamasuit up!)

Doppelgangers: We’ve all met Lesbian Robin, Moustache Marshall, Stripper Lily, Mexican Wrestler Ted and Dr John Stangel — Barney’s elusive doppelganger. If there is a single HIMYM fan who doesn’t go around with the hope of running into a doppelganger, please stand up!

The Cheerleader Effect: Another gem from Barney Stinson. Also known as the Bridesmaid Paradox and the Spice Girl Conspiracy, it basically informs a smitten man that a woman looks hot in the collective but singling her out will reveal that she actually is pretty hideous. So in an attempt to hide their flaws, women tend to hang out with other women less attractive than themselves.

Slapsgiving: Marshall Eriksen shall go down in history as the inventor of what is, arguably, the coolest punishment to have been meted out since being beheaded by the guillotine. A slap.

PS: Don’t get too carried away plotting this merry move on your unsuspecting best friends. You might just be at the receiving end of some slaps too.