賽姐人生 Not Ordinary but Extraodinary

A booty call is a telephone call, other communication, or visitation made with the sole intent of engaging in 
sex or other forms of sexual release with the person being contacted. Traditionally this social practice, 
especially the term "booty call", is associated with a person calling another person for a sexual encounter 
after having already established either a casual or more serious relationship involving sexual relations.

In many instances, a booty call is made when the prospect of a traditional romantic date is highly unlikely
 (e.g., late in the evening, after midnight or in the pre-dawn hours), thus making it obvious that the intent of 
the call is for the sole purpose of obtaining and engaging in sexual intercourse.

Most notably, the booty call is an alternative type of sexual relation between people. One can look at the booty call 
as sexual intercourse taking place somewhere outside the defined social constructs of marriage, dating, and prostitution. 
The lure in this case is the mutual satisfaction and pleasure of sex outside a traditional relationship
 (with all its complexities and commitments). A booty call is typically looked at with the singular purpose of sexual pleasure 
and is not engaged upon to replace traditional relationships. As such, a booty call can take place with two (or more) 
people already involved in a relationship, but without the intent of breaking the relationship; however, 
as an alternate framework for sexual relations, the booty call can meet the urge for intimacy in a period of time or 
situation that allows for little or no sexual fulfillment otherwise. As such, the booty call becomes a gratifying and efficient 
alternative to a drastic change in a social situation, i.e., breaking an otherwise good relationship because of unsatisfying sex.

The phrase is thought to have originated in a comedic routine by stand-up comedian Bill Bellamy in the early 1990s,^[1] 
and was further popularized when musician Fast Eddie's 1995 dance song "Booty Call" received wide airplay. The term 
was originally generally associated with black males^{[neutrality disputed]}, but it is now used by and about persons of 
either gender, and any ethnicity, requesting sexual favors by calling an acquaintance that may or may not be romantically linked to the caller.

Booty calls can also be used by one partner of an ended relationship to request sex from the ex-partner, who may have l
ingering emotions and feelings of a need for continued physical connection, without feeling compelled to continue dating
 that person. This may be referred to as "ex sex."

The term itself is more likely to be used by the person answering the call or others in his/her company than the person 
making the call. For example, "Did John take off?", "Yeah, he had to answer a booty call." It is not considered derisive.

Booty calls or messages can contain made up stories or information so that they are more credible and the other person 
doesn't feel it is aggressive or too direct. ie, sending from home: "hi , I am having some beers around the 
center with some friends, and was wondering if you were around cos they are going home soon but feel like having a couple more xx".

Although traditionally the telephone is used for a booty call, the last ten years have seen the rise of IM, chat, e-mail, 
and text message booty calling. Dating websites have also created a forum for an online booty call.

The term has since evolved to refer to one or the other party to the relationship, e.g. "She's my booty call."

References
https://en.wikipedia.org/wiki/Booty_call_(slang)