Mixed marriage

My wife and I have a mixed marriage: she dances, I do not.

Now a genetics journal says it might be in our genes:

The authors hypothesized that there are differences in aptitude, propensity, and need for dancing that may be based on differences in common genetic polymorphisms. Identifying such differences may lead to an understanding of the neurobiological basis of dancing.

Of course it was this sentence that really clarified things for me:

In the current study, 85 current performing dancers and their parents were genotyped for the serotonin transporter (SLC6A4: promoter region HTTLPR and intron 2 VNTR) and the arginine vasopressin receptor 1a (AVPR1a: promoter microsatellites RS1 and RS3).

(Via John Derbyshire.)