Email: Flakiness [EH]
I know men can be flaky, contact you then disappear. (Some women do that too. One used to write me dusky emails then never respond, until I realized she wrote those emails in the wee hours of Saturday night -- the witching hours for loneliness.) Women are flaky in this way for real reasons (emotions); men [generally] do so for false ones (the hunter/gatherer gone awry).