"There are multiple rings," the ad continues, "and the investigators will inform the male partner when to swap the ring." Again, we assume this doesn't actually mean researchers will be alongside the research subjects during intercourse – or that there is only one ring of each size to be shared among the entire research pool.

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We assume this ring-enhanced intercourse and interview process is only required once they're on the study, and not as part of the application process.

Anyone throwing their hat into the ring will be pleased to know that they're allowed to withdraw at any time.

Use of the word whore is widely considered pejorative, especially in its modern slang form of ho.

In Germany, however, most prostitutes' organizations deliberately use the word Hure (whore) since they feel that prostitute is a bureaucratic term.

Another explanation is that prostituta is a composition of pro and statuere (to cause to stand, to station, place erect).

A literal translation therefore is: "to put up front for sale" or "to place forward".

Common alternatives for prostitute include escort and whore; however, not all professional escorts are prostitutes.

The English word whore derives from the Old English word hōra, from the Proto-Germanic *hōrōn (prostitute), which derives from the Proto-Indo-European root *keh₂- meaning "desire", a root which has also given us Latin cārus (dear), whence the French cher (dear, expensive) and the Latin cāritās (love, charity).

If it sounds like we're taking the mickey, we're not.

We're for any scientific research that will help couples pursue happier, more fulfilling relationships.

Those seeking to remove the social stigma associated with prostitution often promote terminology such as sex worker, commercial sex worker (CSW) or sex trade worker.