I am laying in the air-conditioned darkness of my hotel room thinking, ‘Did I just buy a bottle of knock-off sunblock?’ Is counterfeit sunscreen a thing? Here are the condemning facts:  At eleven a.m. I walked to a ‘pharmacy’ (essentially a minimally stocked drugstore) and purchased a bottle of SPF-30 sunscreen.  The product in question is Samui Sun; Samui  of course, referencing the island of Ko Samui. The packaging further reads, ‘Coconut sun protect‘ and boasts that it ‘protects against sun burn and premature skin ageing‘ (verbatim, misspelling included). Two for the win, right? — 29 days into our trip I was confident I had established a base tan, less the slightly less visible veins on my forearms. (A testament to living in snowy Prince George, Canada for the last five years, and one I am eager to remedy.) Given the perceived base tan, I would do this by purchasing sunscreen that was less than the SPF-60 my Dad-Pants Boyfriend bought for us.   Speaking of Greg. He signed up for a two-day advanced open water diving …