Relating to internet fandom culture, specifically fan fiction and other fan works, Dadson is used as an adjective (and sometimes, a noun) to describe romantic and/or sexual
incestuous pairings between fictional characters who are father and son.
The appeal comes from being able to explore the taboo of incest through the controlled, inconsequential
environment of fiction.
The term Dadson only applies to MLM parent and child pairings, the name for a fictional father and daughter incestuous
relationship would be Dadaughter.