Topics: Is there any limit of texting a casual partner for hookups if they don't reply.?
Most research on hookups has been focused on American college students, but hookups are not limited to college campuses.   Adolescents, emerging adults, men and women engage in hookups for a variety of reasons, which may range from instant physical gratification, to fulfillment of emotional needs, to using it as a means of finding a long-term romantic partner.  Media reaction to hookup culture has been dismissed as moral panic.   
The sexual revolution of the 1960s brought a loosening of sexual morals which allowed for sex to become uncoupled from relationships and non-marital sex to become more socially acceptable.   Some scholars, including Garcia and Freitas, have found that dating , while it has not disappeared, has decreased as the frequency of hookups have increased.   By the mid-1990s, Freitas found that hookups were an accepted form of interactions among sexually active adults especially those located on college campuses. 
According to an opinionated review by Garcia, this is "an unprecedented time in the history of human sexuality."  People are marrying and beginning families at ages later than previous generations while becoming sexually mature at an earlier age. As a result, Garcia and other scholars argue that young adults are able to reproduce physiologically but are not psychologically or socially ready to 'settle down' and begin a family.