The negative reaction to hearing the guy was " a real American cowboy" is conditioned by the European meaning of that term. To us here in the US we think of independent, tough, down home, etc. To Europeans it has very different connotations. One of the women used the term "red neck", and that stereotype is a lot closer to what Europeans think of. Also, "cowboy" is used as shorthand for a reckless approach to politics and world affairs, which is why so many anti-Bush political cartoons in Europe picture him in a cowboy hat with six guns.
So, and yes, I have a point, I am cutting these women some slack for their reaction.
One other thing, did you notice that David was using the horse to cover his shyness when he first came to talk to the women? Everything was "we"--"we thought we'd come say hello"--and so on. He's like the guy in the park with the dog because the pooch makes it easier for him to meet and talk to women.