Don’t Take It Personally: What’s The Story Morning Glory(hole)?

Seattle residents, if you're wondering what that purple light emanating from some guy's fence is, it seems as if it's something pretty remarkable...

gloryhole fence - m4w

Need more women to explore my gloryhole fence....
Through the hole...past your lips 
Across your tongue...
Down past your tonsils...
Shot loads of Cum..
218th pl se Snohomish...look for the purple light in the fence....

Does this guy just stand out at his fence all day waiting for women to answer his ad? Would he know if a dude answered? So many questions.