1. (the right way to use it)
Person 1: *tells a dumb joke*
Person 2: You try so hard that's it's funny. XD
2. (the wrong way to use it)
Person 1: I walked my dog ealier.
Person 2: XD
Person 1: Then I fed the
cat
Person 2: XD
Person 1: AHH I'M TALKING TO AN AUTO-RESPONDING XD
MACHINE!
Person 2: XD
Person 1:
Die.
Person 2: XD