He probably cracks crabs with his teeth.
When you can’t afford a trip to the beach, get the Billabong Donnies Fins Trucker Hat and hitch a ride on a big rig. The Donnies Fins Trucker should close the cultural gap enough for you to have a chance. To seal the deal, buy Rusty a piece of pie at the counter and tell him you know a great crab shanty with a buffet near the coast. You might have to watch him eat a mountain of shellfish when you get there.