This post has made me laugh out loud.
My hubby does the same re dinner, the thing is a few minutes before I serve up I shout "Five minutes" so he has time to finish the page / turn the computer off, etc. Still never works.
But shopping. Oh, how he does my head in shopping. He always has to push the trolley, his choice not mine, but he fannies about with "No you go first, no, after you, honestly, you go first...no, really, you go....". I swear to God, if we went round the supermarket at his pace, letting all the other doddery old gets in front of us, and then just standing there waiting whilst Ethel and Stan decide to stop dead in the middle of the aisle for a catch up instead of asking them to move so you can get by, our shopping would be defrosted by the time we got home and the salad veg would be starting to rot. If I went shopping on my own it would take half the time and cost half as much.