Confluence of specific imagery and experience.

You had a male family member or authority figure in your life who was into John Wayne/Clint Eastwood type of western movies. There's the tumbleweed imagery and the whistling, high noon musical clip. All of these movies are heavy on the benevolent chivalry and making the woman do what you want for her own good.

You experienced male harassment or "locker room talk" about dry vaginas as a teenager. It's right up there with, "if we don't do it my dick will fall off". When that fails the next go to is "if you don't let me do it your vajayjay will dry out like the desert." Always said with authoritative expertise and earnest seriousness.

Then you have kids who get you back into watching cartoons. There's not many that don't at some point have a desert showdown with squinty eyes and that music. But funny. Now that you have kids the novelty of and patience for all that other nonsense is just lost somewhere in that desert. Or anything else that is an irritating thought to your vagina.

Like GOOP. Every damn time I accidentally come across one of those stupid product adds (and I actively avoid and block) my vagina does a horror movie scream and I imagine a posse of LDS like GOOP salespeople trekking across the desert toward my house with a basket of tumbleweeds supposedly for the health of my vagina. My beagle whistle bays out whoo-ooo-ooo in alarm (thank God for beagles, right?) and I find my eyes scrambling around for the nearest horse to make my escape on.