Toplessness

 is the act of being dressed from the waist down but wearing nothing from the waist up. Due to societal norms, it is far more acceptable for men to go around topless - which is better known as going bare-chested - than women. Women from many indigenous tribes still go topless as part of their traditional culture.

Trivia

 * Before the arrival of Christian missionaries, going topless was considered the norm for many ethnic groups, especially those from tropical environments.
 * Toplessness is used to promote gender equality.