Is that how you feel about your weight training as well? Because it's the same difference. You put in work, you get gains. Simple as that. If you don't want to put in that work, you don't want the gains bad enough. And compared to weight training, this is a very passive exercise. 15 minutes sitting in the tub/shower while the pump does all the work.
And to answer your question, A bigger, fatter, harder cock.