prairie vole 

A Prairie Vole is a woman who after one good encounter wants to commit to monogamy because of the hormones released with orgasm.

Awe, shit, now she's acting like a Prairie Vole, wanting me to see only her!

prairie vole by amesababe June 23, 2010

Fuck like Prairie Voles 

To engage in constant sexual activity within a committed, monogamous romantic relationship.

"So, you and Sarah have been seeing each other for a while now. Have you gotten any?"
"Oh, yeah. We fuck like Prairie Voles."

Fuck like Prairie Voles by Yodafan December 25, 2009