The most of you are girls - I am a man - now imagine how a girlfriend or wife would react if I told her she had to leave the appartment in order for me to defecate.
I have had this problem for years, and beeing a train driver, always had to fight it.
Here's some tips I can give you. It's a little bit difficult to write this in English but I hope you will understand what I mean.
Basically, I have my restroom at home where I know that I'm "save" (this is really the word that suits my feelings most). In addition, I scan the public toilets at the places where I have my working breaks and know in which I can seal myself off from the public. I don't mind if these are sometimes not the cleanest places, as long as they are sealed.
If I know that I will not be able to do my business at home the next day, I adjust the foods I eat so there is a possibility I won't have to go. And then I always carry an IPOD with loud heavy metal music - so I go to one of the most sealed places and listen to loud music, this prevents me from hearing anyone else. In addition I close my eyes. Try it, it works pretty well.
At my parent's or grandparent's home, I choose toilets where there is a ventilator or air condition that makes a noisy sound. This gives me a bit of privacy. In addition, I always cary a small radio that I can listen to. Sometimes when I take a bath I do my thing when the water runs, then it works too.
When it comes to friends houses - that's the worst thing really. I always sneak off during the day, at a restaurant or where we may go. Or I go in the night when everyone is asleep.
I have another thing I do, which is really hard to describe. It seems I have light or heavy "sessions". If my stomach and bowel are alright and it's a poo that comes out and finished, I have no problem on the public toilet anymore. However for the hard and heavy minutes, I NEED to be at home.
Can you believe that in ancient rome, people where sitting next to each other, talking while doing there business?
Now I found this site and realised it's a problem, I may try out hypnosis. After all it can't continue like this.