I started to wear my cousins undies when I was 13.
She stayed with us and was the same age going to school in the city.
I saw her getting dressed when she left her door ajar (No doubt deliberately) and was intrigued by these strange garments, Bra, Girdle, Stockings and Panties.
I acquired a set of them from the washbasket and put them on.
What feelings!
She realised that I had taken them and confronted me.
I admitted I liked wearing her things and she admitted that she like me wearing her stuff too.
That was the start of us playing dressups and led to dressing each other.
It then subsequently became much more and cemanted the pairing of underwear with sex in my mind to this day.
I started to buy my own collection and still can't resist lingerie if i like it.
I wear 24/7 and have for many years.
Jan my wife knew I dressed before we married and loves me dressed up.