However, speaking of naked ... there is a way for the modern man to load up on sun in the extra-speedy manner that suits today's hectic life. See, what really needs the sunlight the most is a man's dick. Skipping all that "modesty" and "pants" horse crap and exposing male genitals to direct sunlight is said to increase testosterone levels by a neat 200 percent.
Be warned, though -- there's only one study on this, from 1939, and we don't know that it wasn't just a huge prank. Still, what does a busy modern man in desperate need of that testosterone fix have to lose? Besides his pale complexion and status as a non-sex offender?
"Excuse me while I slip out of something more comfortable."