A morning erection usually alleviated by urination. Usually dry-humping or rubbing around your junk would feel good in this instance. And, when you urinate, you need to do a handstand or pull it down. Even if you do these things, your urine will definitely go everywhere, since morning urinations usually include urine flying everywhere randomly, even disobeying the laws of gravity because of what I can only guess is penis boogers (eye boogers, but in your man hole).
I had a wicked piss boner this morning.