The main problem with that one is chocolate bar + body heat also leads to melting.

Please compare a chocolate bar after 30s in your pocket and 30s in your microwave.

Are you in the microwave for 30s too?

The trick to actually melting chocolate in a microwave is to do it in pulses of only a few seconds, see if it stirs yet, and repeat. Longer runs will quickly destroy it.

Any reasonable person could distinguish between a chocolate bar that melted in a pocket, and one that is fresh from a microwave heating.