The cuss word fits their anal fixations. Read what Freud said about the analy fixated
"we consider it (homosexuality) to be a variation of the sexual function, produced by a certain arrest of sexual development."
http://www.victorianweb.org/science/freud/develop.html
http://en.wikipedia.org/wiki/Sigmund_Freud%27s_views_on_homosexuality
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The Anal Stage of Psychosexual Development - Psychology
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The anal stage is the second stage of psychosexual develop. During this period, the libidinal energies are focused on bowel and bladder control. About.com