Opportunities abound to stay for free at someone's home or apartment while they, themselves, are on vacation (often pet sitting or plant-watering are the only requirements)
Sleep for free on vacation by watching someone's house (and, often, watering their plants and feeding their cat)
The generic British word for dessert is "pudding."
In the 19th century, the "g" was sometimes pronounced as a harder "k." Sometimes, the "n" got dropped. Sometimes that was shortened by slicing off the "pud."
In other words, small, incremental changes resulted in pudding->puddink->puddik->dick.
It's not meant to be dirty; it's just a Victorian synonym for "dessert."
Pepper a cake with currants or raisins, and you get "spots" in your pudding, hence: spotted dick.
