The heightened arousal factor from a sexual experience with someone the first time, that usually wanes thereafter
Girl #1: I'm getting bored with JP
Girl #2: You've only been with him three times!
Girl #1: I know, but everything after the first time is a downhill slide
Girl #2: You should just do one-nite stands then if you only get off on the First Time Factor
Girl #1: Yeah maybe
Girl #2: You've only been with him three times!
Girl #1: I know, but everything after the first time is a downhill slide
Girl #2: You should just do one-nite stands then if you only get off on the First Time Factor
Girl #1: Yeah maybe
by sarasplayroom.com February 2, 2010

by Kevin O'Leary October 21, 2010

The added sexual attractiveness to another as a result of them being forbidden to you. This is anything from teachers to step-mothers, or your best mate's sister. Incest also comes in to this, but that's pretty ill-advised if you ask me.
"Dan's mum just rocks my world, she's really a 5/10 but that forbidden fruit factor bumps her up to a solid 9"
by FretWizard May 1, 2015

Guy 1: Man she's HOT!!!!!!
Guy 2: Nah man that's a DDF.
Guy 1: A what?
Guy 2: Distance Distortion Factor. See shes so ugly now that were close.
Guy 2: Nah man that's a DDF.
Guy 1: A what?
Guy 2: Distance Distortion Factor. See shes so ugly now that were close.
by bombsquad1825 May 13, 2011

by Psyco6 November 15, 2012

by Samwell March 30, 2005

by Wang P. Freely April 4, 2003
