Thatcher Illusion

With partial explanation here:

5O First Dates

The film 50 First Dates is based around Drew Barrymore, who has a neurological condition that causes her memories of the day to be erased during the night.

Here's a case study of this happening in real-life.

Are We Really Attracted To Our Relatives?

Freud thought we may be unconsciously attracted to our relatives - especially our siblings, our parents, even grandparents.

Here's a recent study that suggests he might be right.