Collecting stocks and bonds.
Collecting fleas!
Zoos
With a Hoth IRA.
A 401(K-9).
A stalk-ing! (A stocking!)
COOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOAL!
They can't bond with each other, no matter how hard they try.
They both form a bond in seconds, last (ideally) forever, and are dissolved by alcohol.