The effect that transcends one's curiosity into an overactive drive/need to experience something, regardless of the ending possibilities. It is different from peer pressure since it does not require external forces, but is similar to physiological effects, such as being horny.
A: I think I wanna get a prostate exam, just to see what it's like
B: That's the Pandora's Box Effect, dude. Don't fall for it.

A few days later

A: I got a prostate exam.
B: You look a little different.
A: You think?
by NTRP January 6, 2021
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