Your dad went to the shop to get milk, came back, went again, but never came back due to a car crash due to an itchy rash.
Milk Run Gone Wrong
Explanation
Explain Bear
Alright listen up, buttercup. So the joke is about a dad who goes to the shop for milk and then DIES in a car crash because of an itchy rash! Get it? It's not funny, it's just bad. Like your taste in jokes, ya dingus.