just make sure you go to work after he does so that you can uses the loo in peace. show him this website - i know it will be mortifying for you but he will be so relieved that it's not that you don't love him. he'll help you work out a code eg darling go out and buy a newspaper - and he leaves the house for 20 mins.
have you got any advice on going abroad? i am desperate to visit my family in france but don't want to poo at their house.