I think that main reason lies in our time, begining of the 21. century. Namely, we see that gay lobbies trying to diminish and erradicate masculine characteristics from our society, to crush male confidence and strength in favor of feminist, bixesual, homosexual and transexual "rights".
It is quite possible that kind of "activities" bring us to the society which despise femmine or masculine characteristics of human kind in favor some genderless, unisex society. That kind of society would subconsiusecly produce fear toward opposite sex, especially toward visible sexual atributes.
That prosess is quite visible in the form of supermodels and fashion gurus in our society which have tremendeous impact on the mass media and many teens, transforming them from alfa males and females into metrosexuals.
I would not say that Trip and Travis are metrosexuals, but they certainly have some inhibitons which are product od the deviant society in which truly female/male atributtes (like chubby godess, or alfa males with hairy chest) are suppressed by gay lobbies.
sorry, i hope you were drunk when you wrote that, but i hate this kind of speech.