davegoodie: yes I have broken a few condoms - especially before I discovered Magnum XLs GI would use Okeidos, which condomania assured me were much thicker than Durex or Mates,but still broke a few - much to the consternation of my female companions. Now the Magnums are a tight fit, but at least I can get them on.
Damn shame I have to import them from the USA because you can't buy them here (England)