...Now that you put the ship name like that, I've noticed that, with the fan name Snowflake, their names go nicely together too: Fs and Sf. Cool.
Come to think of it. It did look like Bulk Biceps had a bit of a crush on Fluttershy, But Didn't Know How to express it, in the Episode "Rainbow Falls". Maybe that's why He was afraid of Butterflies in "Flight to the Finish" They were a reminder of His.... Problem.
I mean He's not exactly What one would consider to Be Fluttershy's Idea of Her Ideal Stallion.
Also, Snowflake just seems like a really "obvious joke" name. "OH LOOK, HE'S BIG AND BUFF, BU THIS NAME IS SNOWFLAKE, DOH HO HO!!" But I guess it's just personal preference.