Do you like this joke?

There's this man named Frank. He works on border patrol. There's this Mexican named Juan. One day, Juan is riding a bike, with 2 sacks of sand over his shoulder. Frank stop him and asks him what he's smuggling into the U.S. Juan says nothing, and shows him the sacks only have sand in them. Frank lets him p. This occurs every day for the next 3 years, with Juan always riding his bike with the 2 sacks of sand. One day, Juan doesn't show up. Frank gets worried, since they were good friends now. But the next day, Juan shows up again. Frank asks him where he was. Juan says he was taking inventory. Frank goes HA! You can't take inventory on sand, and asks Juan what he's been smuggling into the country the whole time. Juan replies, "Bicycles."