Why do so many woman have a tendency to do pretensious laughs Esp. white

[senioranonymous]

contemporary middle age woman? Is it just me or do women in particular middle age white woman 28-45 have a tendency to do pretensious fake laughs.I first started noticing this about a year ago and sure enough over time i tune in to some media program with middle age white woman and consistently hear the same consistently pretensious laugh.I'm basing my theory on the same and almost identical fake laugh that comes off mirthful but yet very nonchalant at the same time.So it tends to begin mirthfully and end of very nonchalant and the more syndicated and contemporary the program is the more pretentious the laugh is.The "final straw" came when i tune in to an all female broadcast at a christian radio program and it was also both prominent and pervasive there to and the trend tends to be middle age contemporary white women.I don't even know if they are aware of this redundant pretensious laugh, i don't know if it's some sort of defense mechanism to ease any uncomfortableness and or anxiety, maybee it's just me and perhaps ther is a correlation here between the growing epidemic of anxiety and other psychological disorders.