Charts from OKCupid, showing how straight women and men rate each other based on ages. For women, the men they find most attractive are roughly their own age. For men, the women they find most attractive are roughly the same age - 20 to 23 - regardless of the age of the man. (538)
Good fucking Christ.
And this is why my husband is 30 with a baby brother on the way. Yep. His 54 year old dad knocked up some 24 year old.