An old mate of mine used to have some fairly bizarre domestic habits. It used to drive his housemates up the wall at times, although it did have some rather surreal moments as well. He used to make a big tupperware full of whatever filling he fancied on a Sunday and then make his sandwiches from it for the rest of the week. Some of the fillings were vaguely conventional - Tuna with a variety of sauces, for instance - but a lot weren't. Every Sunday, whilst he was out, whoever cooked lunch would leave a portion for him. One Sunday evening when I was there he came in, took the plateful of meat pie, potatoes and veg out from the fridge and tipped it into his tupperware. He followed it with a tin of tuna, some tabasco sauce and a good squirt of mayonnaise and then mashed it all up with the potato masher. He offered the rest of a taste before he shoved it back in the fridge. We all declined politely, for some reason.