When, after having seen enough amateur porn, an individual is able to walk in the street and know what people look like naked even before actually seeing them take off their clothes. This can be either a blessing or a curse, depending of course on who you are looking at.
Dan: Wow! That chick is bomb-dot-com. I wish I could see her naked.
Mac: Been there...seen that
Mac: No...but i know what she looks like...I've got Pornocular syndrome.