An attractive woman from New York is driving through a remote part of Texas when her car breaks down. A few minutes later, an Indian on horseback comes along and offers her a ride to a nearby town.
She climbs up behind him on the horse and they ride off. Every few minutes, the Indian lets out a whoop so loud that it echoes from the surrounding hills. When they arrive in town, he lets her off at a service station and yells one final “Yahoo!” before riding off.
“What did you do to get that Indian so excited?” the service-station attendant asks.
“Nothing,” she says, “I just sat behind him on the horse, put my arms around his waist and held on to his saddle horn so I wouldn’t fall off.”
“Lady,” the attendant says, “Indians ride bareback.”