Since media, particularly television, are an important source of sex education, it is relevant to know what types of sexual messages are being depicted on television. This research examines what types and frequencies of sexual behaviors are found in Mexican telenovelas produced by Televisa, Mexico's largest television network, and how they have changed over time. This research and analysis should be useful to professionals in Communication, Sociology and Psychology, or anyone who may be interested in the portrayal of sexual behaviors in the media, in popular culture and television or in telenovelas and soap opera content.