Macho calado

Macho calado (lit. tested macho) is a term to refer to a male that after having given an open-minded shot at homosexual intercourse has decided that he does not dig it and prefers that with females. It's mostly used as a joke targeting those easily scandalized.

Example:

Madre: Oye, y ¿a tu compañero le gustan las mujeres?
Hijo: Sin duda... Es macho calado.

Mother: Does your roommate like women?

Son: No doubt about it... He's a tested macho.