That’s no bee

Bad bee! I’m telling on Fluttershy that you’re stinging Rarity’s butt!

Personally, I find this very boner-inducing, and I’ll explain why.
 
It’s not just because of her sweet marshmallowey ass being on display, looking all sore from the sting…it’s her scream.
 
Rarity prides herself on being a ‘lady’, and belting out a scream like that is quite UN-ladylike and uncouth. In other words, going against the values she projects to make herself look better then other ponies.
 
Well, this pictures proves that even high class, ladylike ponies can scream just as loud as the common folk when they get stung on the ass!

@Basteal  
you mean sadism? unless I misread that…

Its just another form of masocism. I like it when women are in pain (and they don’t like it) because.. Lots of answers here. None of them something to be proud of.

Never quite got the bee sting fetish, or the sneezing fetish for that matter. Ah well, to each his own.

Bee sting fetish! It’s the insect equivalent of watching a snuff film! XD