TL;DR - Amazon Echo's Alexa is Obviously Sexist [23/Sept/16]

Sources:

Article:
http://www.telegraph.co.uk/technology/2016/09/19/amazon-echos-alexa-is-yet-another-virtual-assistant-reinforcing/

The horse video. Yes, youtube allows this:
https://www.youtube.com/watch?v=52Ij0qlKDAQ

Why do computers have female voices:
http://edition.cnn.com/2011/10/21/tech/innovation/female-computer-voices/index.html
http://www.apa.org/monitor/dec04/women.aspx
http://www.ncbi.nlm.nih.gov/pubmed/15491274

"Alexa" is a default 'wake command' you can call your box whatever you want:
https://www.amazon.com/gp/help/customer/display.html?nodeId=201601770