Know what you mean David,you hear other guys saying I'm bursting and I've gotta go and they indeed go and empty,but for people like us bursting means bad news as you get lock up and to be able to go can take over an hour.I think it's the sphincter going into spasm.I would be interested if there is a way around this prob,in the meantime I use self cathing as a way around it,not satisfactory but it works.