I mean if you really wanted something close, acquire a cow or horse heart, I recommend cows as there more readily available at butcher shops, with a pair of jumper cables, attach them to the pulmenary artery and superior vena cavalry. Apply salt to the surface and watch for the muscle contractions, now be sure the heart is fresh and/or has been stored in a cooler, otherwise you won’t be able to get the muscles to contract which ruins the whole experience. With the battery pumping jolts through the muscles, gently insert your “shaft” into the inferior vena cava and feel the overwhelming ecstasy of pulsating, living organ you’re penetrating.

Just a suggestion.