Originally Posted by $5 submissions

There's even a behavioral evolutionist theory behind that: Big tits were evolved by women to make men stick around longer to help protect her and her offspring. Most mammals only have enlarged breasts when they are pregnant. Ergo, there is a competitive advantage to having enlarged breasts all the time because the male will stick around thinking the famale is pregnant with his offspring. Those with this adaptation have more offspring living to reproductive age. Add thousands of years and the male brain is hardwired for this.