Before revision: In common usage, the term single is often used to refer to someone who is not involved in either any type of sexual relationship, romantic relationship, including long-term dating, engagement, marriage, or someone who is ' single by choice ' .
After revision: In common usage, the term single is often used to refer to someone who is not involved in either any type of sexual relationship, romantic relationship, including long-term dating, engagement, marriage, or someone who is " single by choice " .