"A double bond is like a double handshake between atoms and has two practical implications: first, the bond is less stable, since one hand can be freed up at any ..."
Or a single bond: Atom-Atom
In the link:
German redditor translates the title of Angela Merkel's PhD thesis in physical chemistry and explains, in quite some detail, what it is actually about.
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.