A sticky situation

You heard about Joe?
Joe spends all day sniffing glue.
It all started when he was trying to glue two things together and they didn’t stick.
“Does glue go bad?” he asked his wife. “You know, like milk.”
“Does it have an expiration date?” his wife replied.
He looked for an expiration date on the bottle, but there wasn’t one.
“Nope. Maybe if I smell it…”
And that’s when the glue-sniffing started.
“No, really,” he’d say, as high as a kite. “I’m just checking to see if it’s still good.”
Then he’d sniff and let out a long, slow “Yessssssssssssssssssss.”