Interactions Between Male and Female Attractiveness

The previous two posts raise many questions that need to be addressed separately. I will mention them briefly in the post to avoid potential misunderstandings and to suggest some interesting avenues of thought:

• Do people choose partners who are at a similar place in their lifetime graph of overall attractiveness?
• If men reach peak attractiveness on average X years later than women, why is the average age gap between the sexes at time of marriage only Y years? Does X = Y? If not, does this suggest my models are off?
• What more can we find out if we begin graphing not attractivenes relative to an individual's peak, but "absolute" attractiveness relative to other people? For instance, can we identify possible causes of a pattern of older men remarrying younger women, but of lower status/stature than previous wives? Or can we identify moments when the overall attractiveness of a couple begin to diverge, creating potential for problems?
• Here we have looked at sexual attractiveness, but what about the role of friendship in choosing a mate? Friendship likely tends to be easier with someone of roughly the same age. Does this temper differences in absolute attractiveness and attractiveness relative to one's lifetime peak?