The Sands Effect 

The Sands Effect occurs when you spend a night out drinking and get lucky enough to bring a girl back to your place. You only got the girl over because you were drunk and loose and free of any pressure. But because you were drunk your cock stays limp as if it were filled with sand. And because of this, sex is not and option. You go out the next night without drinking hoping to get the same girl over once more. You see the girl and at first she seems willing, but sober you is not good enough to get the girl over. So that night you go home with a cock harder than a rock, but with no female, only your left hand. And that ladies and gentleman is the sands effect.

One week into college Mateo had suffered The Sands Effect on three different occasions.

The Sands Effect by Willy Boof September 18, 2019

The Sandy Effect 

(Noun) - the process of elaborate, underhanded, yet whimsical deceit of an unwitting stranger, usually emphasizing the use of telecommunication devices and web-based social networking forums and/or media platforms. The Sandy Effect cannot be borne through malicious intent, only through the serendipitous collision of an unsuspecting victim and an unsuspecting "Sandy."

Person 1: Did you hear about Stacey? She wasted the whole week texting some random guy who she thought was her TA.
Person 2: Oh snap, no way! Another victim of "The Sandy Effect"...

The Sandy Effect by EffectiveSandy June 25, 2009