Erm... Biologically humans are attracted to people who are at their "reproductive best" (for want of a more scientific term!). Do you really think your granny/grandad suddenly fancy people in their 60s and 70s?
I was talking about thirtysomething women, not grannies in their 60s.
A woman in her 30s should have moved on from the school playground crush phase. Teenage boys are generally ridiculously immature.