Society doesnt like circumstances when they are outside the box....and in the short term tends to have a fixed mindset.
Recent radio discussion program on large age gap relationships:
http://cocomoon.co.uk/have-you-been-...p-relationship
Look at women's skirts 100 years ago. What if a woman ran around in a skirt above the knee back then? Why is it acceptable now but not then? Flashing an ankle then was a big deal when flashing all else now is acceptable to many. Why might a 40 yo age gap be unacceptable now? Why is it acceptable that a woman can show her face in the UK but not in many places in the middle east? Why is a 40 year age gap acceptable to some and not others and why more acceptable in some societies and not others?