Women are from Venus

From http://www.news.com.au/technology/student-peter-backus-uses-drake-equation-to-explain-why-single-men-cant-find-a-girlfriend/story-e6frfro0-1225818675860

Peter Backus, a native of Seattle and PhD candidate in the Department of Economics at the University of Warwick, near London, took on his own dating woes in "Why I don't have a girlfriend: An application of the Drake Equation to love in the UK."
[...]
In the paper Mr Backus summarized that on a given night out in London there is a 0.0000034 per cent chance of meeting a woman that meets his criteria and who is also interested in him.
[...]
The Drake Equation was developed in 1961 by Dr. Frank Drake at the National Radio Astronomy Observatory in West Virginia. It reads N = R* x Fp x Ne x Fi x Fc x L, and helped predict that there could be 10,000 civilizations in our galaxy.

Of course, the fact is that women are strange alien creatures anyway - so this seems like a good application of the Drake Equation. Speaking of which, the wikipedia article on the topic gives the best current estimates for the parameters of the Drake equation as follows

Values based on the above estimates,

R* = 7/year, f_p = 0.5, n_e = 2, f_l = 0.33, f_i = 0.01, f_c = 0.01, and L = 10000 years

result in

N = 7 × 0.5 × 2 × 0.33 × 0.01 × 0.01 × 10000 = 2.31.

2.31 extraterrestrial civilizations (currently) in our galaxy is not a very high number.