Sexual attraction
Sexual attraction was a form of attraction based on sexual desire or arousal between people. Sex appeal was an individual's ability to attract others sexually.

In 2364, Captain Jean-Luc Picard asked Counselor Deanna Troi's opinion on whether the Ligonians would injure the kidnapped Tasha Yar. Troi didn't believe so as the Ligonians seemed mainly curious, however, she did sense some sexual attraction from all the males. ()

External link 
 
Sex and reproduction
Psychology