Is it normal that i enjoy masturbating while wearing my wifes panties

Im a 41 year old male who realy enjoys masterbating at least five or more times a week. I usualy wear my wifes panties while doing so, I find it very erotic and have a more intence orgasm this way. I have been married once before and did the same, and from the age of about fourteen would wear my cousins panties,and also fantisize about women and men or boys of my own age and from time to time sill do.I love the feel of silk and satin against my shaven pubic area and ass as well. Sometimes I go to wal-mart and buy myself a pair of sexy panties and it gives me a rush to wear them in everyday event under my clothing.