Is it normal to sniff my flatmate's used panties

I am very attracted to female undergarments and I love the taste of pussy fluids.

Many mornings, I wait until my flatmate has left for work then I steal into her room and go through her laundry hamper to find the most recently discarded pair of panties from the night before.

I then proceed to sniff and lick the crotch area clean as I jerk off. I love it most when she is in the 'wet' part of her cycle as there is a lot of juices and it is usually still warm and moist!

I also have a shoe fetish and I love fucking her shoes and cumming on/in them. I clean them after (with a rag not my tongue).

Sometimes I take her clean panties from the dryer and smear some of my semen on the crotch area. The thought of her wearing them later on turns me on til no end.

Oh and I also discovered her dildo in her underwear drawer. It is a tiny discreet pocket type. I sometimes stick it up my ass while fucking her shoes and sniffing her used panties. This is the ultimate experience for me.

PS: We are both attached to other people.