Churning twenty loads of cum on my speedo.
I've always fantasized about a bukkake on anybody's speedo bulge during the time that they rub themselves one out, so I saved up twenty loads and used that a lube during the time that messing it all over my taut speedos. Usually I would cum throughout the material at the end, but in this case there was so much cum all over the place already, I made an exception. :)