Manly Courtesy

When a man helps another man avoid something regretful be it missing a hot chick walk by or his gf/wife's birthday

Example 1:

Guy 1) Dude, your girlfriend's birthday is tomorrow, you know that right?
Guy 2) Oh shit! i totally forgot, thanks!
Guy 1) Manly Courtesy

Example 2:

Guy 1) hottie 6 oclock
Guy 2) daaayum
Guy 1) you owe me...