"To the people who say they "can't" use a public bathroom or go #2 in a public toilet, your wrong. The right phrase is "you refuse to use" not "can't." There is a big difference."
I think that's over-simplifying the issue, but okay. I could have goosebumps on my arms and a cold sweat from having to go, yet I can't and I won't. I've tried before and failed. So, I'd say I fall into both of your categories. Since this is a somewhat delicate matter, I'll leave it at that - I can't and won't, if that makes any sense.
But, it's not a big deal for me. I've learned to live with it and I am very healthy - even after dealing with this for as long as I can remember, so you won't see me scrambling to see a shrink or joining a support group.
I'm not trying to imply that it would be easy or without fear but it can be done.
I saw these fears overcome in Navy Boot camp. Our company had about 80 sailors, with only 5 toilets and 5 urinals. To make matters worse, the toilets did not have doors on them plus 2 out of the 5 toilets looked right at sinks and mirrors. In other words you could be shaving in the morning and look into the mirror right into the toilet stall.
Many guys refused to go, for many days (I held out for 3 days), but as pressures mount, demands increase, and the recognition that everyone was in the same "boat" you just got over it.
My wife also avoids porta-potties and public toilets as best as she can, but has given in when home can't be reached in time. I understand also avoiding toilets in offices or homes that seem to have "thin" walls. You really don't want some people to hear certain sounds.
However, these examples are about manners and hygene, not a medical phobia.
As a side note, have you ever been a spectator at a marathon? Many runners (men and women) dropping trou' and relieving themselves along the road without any cover. Pretty gross.
Wow! I never thought I'd have such a long discourse over such a silly topic. I think I'm going to take a shower....with the doors shut and locked. 8^)