When you fuck a lady up the vagina for a bit whilst fingering her arsehole so that you can later secretly slip your dick out and shove your massive erection right up her arse.
I just doublebanged Elaine and she noticed and screamed for me to stop.
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.