I have read, ahem, that there is now an entire sub-genre of gay video pornography in which gay men seduce and have sex with "Mormon missionaries" clad in the iconic white shirts, ties, and badges.
I can see how the outfit as worn by young, clean-cut, all-American, straight boys (repping a conservative, anti-gay church to boot) could easily become fetish material, so it didn't surprise me.
There is an exmo in the management of the company. It must be getting harder and harder to find authentic models (no tattoos, no piercings, facial hair, willing to get an Idaho haircut, etc) in this day and age. Lately some of the MPs and WML's have had beards.
Thinking about it for a moment longer, it would seem to be the LDS equivalent of the "sexy Catholic school girl" porn trope with its white blouse/plaid skirt uniforms.
We'll know LDS has hit the forbidden-sex-symbol big time when the mishie outfit is available as an adult Halloween costume.