Roman originally referred to the practice of Romans forcing themselves to vomit so they could continue eating and drinking.
"There are multiple historical sources from both the Republic and Empire periods which seem to indicate that aristocratic guests at very large, very lavish parties would self-induce vomiting in order to keep eating and/or drinking.
This was not the norm, and seems to have been seen as a sign of decadence."
The sexual connection is
Emetophilia, also known as
Roman shower, is the sexual arousal from
vomiting,
[1]: 373 being vomited on or watching others vomit.
[2] The fetish is considered a
paraphilia.
[2]
"A
paraphilia is an experience of recurring or intense
sexual arousal to atypical objects, places, situations, fantasies, behaviors, or individuals.
[3][4] It has also been defined as a sexual interest in anything other than a legally consenting human partner.
[5][6] Paraphilias are contrasted with normophilic ("normal") sexual interests,
[7][8] though the definition of what makes a sexual interest normal or atypical remains controversial."
SSL