Upon exiting the hot tub, Matt's lady friend exclaimed how excited she was to get to bed. Looking down, Matt thought, "it must be due to the Growthage".
The opposite of shrinkage, when the mail genitals shrink when they are exposed to cold. Growage is not the same as a boner since the penis remains flacid.
That sauna was so hot that I got a major case of growage in there. It didn't hurt that when I stepped out I immediately saw the milf who owned the house.