Unless I'm sick, I sneeze rarely enough that changing gender wouldn't really be an inconvenience so long as I wore slightly baggier tops from now on, kept some spare clothes in my back pack or something like that for the odd moments when it does happen.
But thinking about it, even the latter option wouldn't be that hard to deal with as I can't think of a single instance where I would mistake a baby for a muffin and just scarf it straight down. I mean unless they've been placed directly on your kitchen counter or dining room table and are being completely motionless and silent, something babies never are, there's not many times you'd see a muffin in the place of a baby and be unable to guess which one it was. I mean sitting strollers or high chairs, being held by their parents, moving about, and generally making noises that muffins simply don't, I'm sure you could think of a few more but you get the point right?