My dad was disabled and could barely walk. We were on holiday in our caravan with our chemical toilet in its own tent a few yards away. We had just had morning coffee in disposable plastic cups to save washing up, and Mum decided we should go for a walk. We left Dad lying on the long bench and said we'd only be about 20 minutes. It was a lovely walk and we were actually gone about an hour. When we got back, there on the floor was a disposable plastic cup filled to the brim. Poor Dad had needed to go and couldn't get up without help. All he had was the cup and as it got fuller and fuller, he was scared he wasn't going to be able to stop before he reached the top. He just made it!!!
We just told him he was lucky he wasn't a woman.
We did always make sure he'd been before we went for a walk again though.