Latinos are gang members. Native Americans are alcoholics. Wheelchair-bound individuals are helpless. Gays are effeminate.
Lesbians wear their hair short.
Older adults need constant care. Anglos are either racist or are rednecks. Homeless people are drug addicts. Since our brains naturally classify what we see, we can't help but notice the differences in physical attributes between one person and another. But it is not natural to stereotype.