My Con Law professor had an amusing analogy for levels of scrutiny the court uses to determine whether a law is discriminatory under the Equal Protection clause of the 14th Amendment.
The 3 levels of course are strict scrutiny, intermediate scrutiny, and the rational basis test. Strict is obviously the highest level, rational basis the lowest.
He compared the rational basis test to a pair of baggy jeans: the fit of the law to the purpose just has to be loose.
He compared the strict scrutiny test to Spandex: the fit of the law has to be extremely tight to the government purpose.
What's intermediate then?