I sometimes wonder if it is by design that we are told to want the ideal person and then they tell us what the ideal person is just so that someone else can make money. I know that may sound weird and i don't know if i can do it justice in a reply but here is the gist of what i mean.
Now, i am not prone to conspiracy theories but also am willing to accept that there are those in higher power then me able to do things i cannot say anything about. An example of is Debeer's and how people have been conditioned to believe that to show your love, you must throw your hard earned money at a worthless rock (serious, check this link out).
Now here in America, the divorce rate is almost 50% thus for me, it is not to hard to stretch that maybe the ideal person is done so that debeers makes money, the wedding idustry makes money, divorce lawyers make money, rinse and repeat. Maybe this is the reason why i am not married (well, other reasons really, but i will blame debeers :) ) but it just seems so convinient that people never find their prince charming or playboy model and wonder why their mate looks nothing like their dreams and thus eyes start to wander.
Just my two crypto cents from a guys perspective on the whole ideal mate thing.