Why Does “Dream” = “Ideal”?

Scott Simpson, of YLNT fame:

On my ideal date, a pretty lady laughs at my jokes over a delicious meal. We end the night by making passionate love. On my dream date, my 7th grade science teacher points and laughs at my teeth as they slowly crumble into the gravy boat. Our sommelier, Nick Nolte, brings us a bottle of live ants.