When a group of attractive people are placed in a group their attractiveness gets diluted since their differentiating features get compared to other. It is the "Cheerleader Effect" but in reverse.
They are a 10/10 alone but a perfect 6/10 around other attractive people.
Johnny : Yo Vinny this hot chick don't look so hot anymore standing in this beauty pageant!
Vinny : Nah... its The law of averaging 6s. None of these bitches look as hot unless you got them alone!
Someone who jumps from one relationship immediately into another one.
Serial monogamists can not stand to be alone and often suffer from vast commitment and insecurity issues.
Because they jump into relationships immediately after the previous one has ended, serial monogamists typically don't take the time to reflect on their behavior or why their previous relationships failed; thus, they end up making the same relationship mistakes over and over again.
Person 1: Damn, Dustin already has a new girlfriend?! It's only been two weeks since he broke up with his fiance! I think he's a sociopath.