"New, super Viagra, stays active for up to 24 hours!"
Sweet Jesus. I'm female, so I can't pretend to fully appreciate the nuances, but a 24 hour erection sounds massively unpleasant to me. (James backs me up on this one.) How would you use the restroom, for god's sake?
Not quite in the same WTF league as "Ejaculate up to six feet!" which still cracks me up, but still, you gotta wonder.