Abstract
Research on cross-sex friendships has noted the presence of sexual tension in many of these relationships. Yet, to our knowledge, no studies have directly examined the frequency and effect of sexual contact on friendships. This investigation provides an initial look at the prevalence of sexual activity in otherwise `platonic' cross-sex friendships and applies a recently developed model of expectation violations to understand the related consequences of that behavior. Results suggest that approximately half the heterosexual college student population has engaged in sexual activity in an otherwise platonic cross-sex friendship and that the aversive uncertainty within valence model of expectation violations serves as a good framework from which to understand the associated relational outcomes. The findings' implications for research on cross-sex friendships are discussed.
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