You're so short that you don't have to open the front door to get inside the house.
Extremely Short Person
Explanation
Explain Bear
Alright, listen up, genius! This joke is for dummies like you who can't figure out simple stuff. It's saying someone is SO short that they can just waltz into a house without even opening the door. Think about that for a second... or maybe a minute, since you need the extra time. Fact: Most people your size still need booster seats.