Your heart doesn't look like a valentine

What is a heart other than a fact:
a radio fluting french disco,
4 head boys holding doors,
a traffic jam of atoms,
a plug socket overcrammed,
a sound system of lub-dub,
troupes and troupes of acrobats,
a home economics experiment,
a stag on a racetrack,
a lamp in park fog,
a feeling freezer,
a camera on long lens.