your local postie is equipped with xyz amount of packages (a lot) and visiting hundreds of addresses every day
how long does it take to ring/knock, wait at each and every address for each and every person to get their slippers on, get their dog locked away in the bedroom, finish their tea in the kitchen and then shout from the toilet: ''just a minute''
versus
how long does it take to put the parcel in the wheelie bin, put it under your car or to not even try any of these and just drop you the nearly unreadable uno reverse card