a) Time you've given yourself to shower after deciding to jerk off before an event.
b) Typically before work, meeting someone for an activity or dinner, or school.
c) Searching for the perfect porn scene typically takes precedence over getting ready on time, limiting the time to shower.
Friend 1 , "Sorry buddy, I had to rush to get ready..."
Friend 2 , "One Minute Shower huh?"
Friend 1 , "Yeah, too many good scenes."