By Peter Backus, University of Warwick, original link here ~ <a href="http://www2.warwick.ac.uk/fac/soc/economics/staff/phd_students/backus/why_i_dont_have_a_girlfriend.pdf" rel="nofollow">http://www2.warwick.ac.uk/fac/soc/economics/staff/phd_studen...</a> Reminds me a bit of Steven Strogatz work on <i>"Love affairs and differential equations"</i> ~ <a href="http://tam.cornell.edu/tam/cms/manage/upload/Love-Affairs-and-Differential-Equations.pdf" rel="nofollow">http://tam.cornell.edu/tam/cms/manage/upload/Love-Affairs-an...</a>