It's the morning calls that are the worst. I would happily not answer the door; but it might be the postman in the morning, and missing a parcel would mean trudging to the sorting office, so I have to answer.
To be fair, very few people I know would just drop in now. Nowadays everyone texts before making phone calls, never mind knocking on the door. Life is less spontaneous, but I think it's for the best. I don't keep the house visitor ready at all times, and if I want to have a third cup of tea in my pyjamas before getting dressed, I think I have earned that right 