Definition of "LMR"

I figured she'd probably started dating someone else, someone who had been able to break through her LMR.

2005, Neil Strauss, The Game: Penetrating the Secret Society of Pickup Artists, Text Publishing Company, page 372

A woman's LMR threshold may differ from person to person, and a woman's own LMR threshold will change depending on the value of the man she is about to sleep with and other circumstances.

2007 February 6, Erik von Markovik, The Mystery Method: How to Get Beautiful Women Into Bed‎, St. Martin's Press, page 200

The first way around this L.M.R is, if she says, "We shouldn't be doing this", reply, "You are right. This is so bad." And continue kissing.

2012, Greg Dean, Elite Dating Skills: Black Book, Sonic Audio Publishing