When I first posted this I thought I hope this lot don't think I'm weird. However, my previous cats Suki & Cleo both always escorted me whenever I used the bathroom. Suki even supervised bathtime and if she thought I was taking too long, would sit on my chest and demand I get out - now.
Jake, however, doesn't go that far but he does insist on attending all visits to the bathroom no matter what the reason even those in the middle of the night. He has even been known to race me so he can get there first.