Porn goggles 

The anomaly of finding an ugly person attractive as soon as their genitals are exposed. Usually the result of extreme randiness, but not always.

Sofie - "Eeew, did you seriously go home with Larissa last night??!!"
Steve - "I know, I know! I wasn't gonna actually DO anything, but then she took her knickers off and the porn goggles appeared..."

Porn goggles by Dirty Animals February 12, 2009

Porn goggles 

When someone's perspective of someone else is altered by predicting or imagining what they look like in a sexual context.

"That barmaid looks wise is a 3, but my porn goggles are saying she's a 9"

Porn goggles by Porngoggles August 24, 2015