That's a tough one. I'm almost 100% sure that most used perfume in May was Prada Amber Pour Homme, my favourite one ever I'll be finishing my 1st bottle soon, time to re-stock my Prada supplies
The other one would be Prada Infusion d'Homme.
The rest? Since I got a wonderful gift of perfume samples from a wonderful soul I wear different fragrance daily, learning new scents and deciding which of them I like.
There's no doubt my most used note this month is IRIS