I dont answer any numbers.
I make the wife answer and then have her tell them I am not home.
She then has to relay to me what they wanted. I then formulate a response that she then has to deliver.
Unless it really is someone I want to talk to...then she is supposed to instinctively know that I am in fact home and wish to be delivered the cordless phone in my easy chair.
Simple.
Many peeps don’t like leaving messages, they just phone the next number in the book.