Yeah my thinking behind it was more along the lines of functional strength training, rather than classic bodybuilding for mass/strength. More similar to the way olympic lifters train (although they train for speed-strength) than bodybuilders or most people on any sort of mass/strength program. The aim being not to grow more muscle fibre, but purely to develop the neurological highways to the fibres that are already there.
Exercise strength training kettlebell conditioning diet health ultimate fitness workout is a good source of functional strength training info (no affiliation); you'll see routines with people doing several sets of pullups everyday throughout the day, steering well clear of muscular failure, in order to quickly develop pullup strength for the army.... etc etc.
Of course its just speculation that this is the optimum way to train the pelvic floor muscles... I'm not entirely clear on their role in erections to be honest. Time for some research!