I've never heard heart in my mouth--that would be a very tight squeeze, come to think of it. I don't think anybody's mouth is big enough to hold a heart. I mean, it's hard enough putting a whole chicken gizzard into your mouth or even an entire dinner roll--and definitely not a whole hamburger. So, nope--the heart would not fit into the mouth at all. But a little bitty chicken's heart would easily fit. Apologies, as usual, to the vegetarians.

Beating regards,
WordWolf