I'm a Dom and I've always been that way.

I recall being in primary school and fantasizing how delightful it would be to see a girl in my class caned on the bare bum.

My childhood was normal and not subject to any excesses. I remember getting into serious trouble on one occasion when I described my fantasy to another student who told everyone. After that I've learnt to keep my feelings to myself.

I'm sure that the nature and nurture debate rages in this area of psychology as much as everywhere else - but there are certainly some who are born wired up with this sexual preference.