The $4 MILLION apology ring Kobe Bryant gave to Vanessa screwed things up for cheaters everywhere ... so says Marlon Wayans who says Kobe set the price of forgiveness way too damn high.
Marlon dished out the knowledge after we asked if Robin Thicke's apparent flower offensive would help the singer win back his wife after she broke things off.
"Robin's trying to bring it back to simplicity," Marlon said ... "Kobe changed the game."
"How is any man that f**ks up ... and we all f**k up ... how am I gonna compete with that?!"
For the record, Kobe didn't just splurge on a ring ... he also gave Vanessa 3 MANSIONS!
... and they're still together.