A Mexican on his bicycle crosses the border with a large sack.
The border patrol agent stops and asks him what’s in the sack. “Sir, it’s just grass.” The agent looks into the sack and lets him pass.
The following week, the Mexican crosses the border again on his bicycle with another sack and the border patrol agent stops and asks him what’s in the sack.
“Sir, it’s just grass.”, and the agent lets him through.
Years pass and every week the Mexican crosses the border with a sack of grass.
Finally one day the border agent retires from his job, but is ever curious about the Mexican’s sack of grass.
One fine day, the retired patrol agent sees the Mexican and asks him, “Hombre, now that I am retired, please tell me what were you doing with those sacks of grass? Surely you were up to something!”
The Mexican says to him with a smile, “Sir, I was smuggling bicycles.”