wow... so does that mean some people will genetically be predisposed to bond with certain people?
If you want to look at the genetics of attraction, it is thought that this has more to do with our immune system.
We are attracted to people with immune systems (HLA/MHC typing) that is the most different from us. Human leucocyte antigen/major histocompatability complex is thought to give rise to pheromones, and it is also thought that this is why kissing has evolved, so we can get close enough to sniff each other.
The problem today is that the birth control pill mimics pregnancy in women, and a woman's preference (scent wise) is for someone with a similar HLA when pregnant, so kin.
When women come off the pill to get pregnant in a long term relationship, they may find that they are not as attracted to their partner.