Although I lack field experience, I have read a lot, and I know that is common for any woman to feel attraction to older men, sometimes much older, and is common for older men to feel attraction for younger woman, frequently much younger.
Check demographic statistics of any country, and you will find that any country has older males marring, on average, younger woman.
Social pressure to make a woman date a similar aged male, is purely religion based, which on some societies becomes custom,and extends itself out of religion, and even into law. But neither custom, religion, or law can change basic human instincts.