It was important and groundbreaking in helping the breeder majority understand homosexuality.
About 35 percent of China's labor force is in agriculture (compared to 2.5 percent in the U.S.). http://factsanddetails.com/china/cat9/sub63/item348.html
It's about the literal visual and act.
One is hairy man colon being penetrated by another man, in which his penis will get fecal matter residue on it, compared with two fresh-looking, hairless smooth curvy bodies licking each other.
It's like presenting two buckets, one filled with shit and used needles, and the other filled with rose pedals from Luxembourg. Which one are you going to get more grossed out by?
Men get all squeamish about seeing two guys get physical and are "grossed out" by it
Well no shit, Sherlock. God forbid a man get grossed out at the sight of another man's gaped hairy penetrated smelly colon, but not be grossed out by a woman getting her clitoris licked by another woman. Who would've thunk!?
Two women together don't stink up a room with their fart fumes.
Moral argument aside, two women together is a relatively safe and clean form of sex. It's even cleaner than heterosexual sex.
It's not about double-standard homophobia. It's about common sense. The two are very different from each other from the perspective of hygiene: far from equivalents.
Two women = clean, Icelandic spring water, spring meadowsTwo men = farty fart feces pants, sewer, toxic sludge