People's emotional reactions and desires in initial romantic encounters determine the fate of a potential relationship. Responsiveness may be one of those initial "sparks" necessary to fuel sexual desire and land a second date. However, it may not be a desirable trait for both men and women on a first date. Does responsiveness increase sexual desire in the other person? Do men perceive responsive women as more attractive, and does the same hold true for women's perceptions of men? A study published in Personality and Social Psychology Bulletin seeks to answer those questions.