I do it because I can.
I confuse people.
A long time ago in a galaxy far, far away I used to be part of an Improvisational Comedy group in San Francisco. The eight of us (AKA the “Improv Alternative” and later as “Anchovi Daiquiri”) worked in nightclubs, theaters, street fairs, and any place that would let us through the door. We would do a two hour show made up entirely from audience suggestions.