Snowballing or snowdropping[1] is the human sexual practice in which one takes someone else's semen into their mouth and then passes it to the mouth of the other (another), usually through kissing.[2][3][4][5]
The term was originally used only by homosexuals.[1] Researchers who surveyed over 1200 gay or bisexual men at New York LGBT community events in 2004 found that around 20% said they had engaged in snowballing at least once.[6] I
