In grad school, I had a study partner that turned into a FWB. I was 28, she was 22. A gorgeous thick redhead with huge tits, wide hips, full lips, and the perfect about of chubby. Kind of like a slightly thinner woman one would see in a Renaissance painting.

One of my favorite parts about sleeping with her was how insanely wet she would get, and how quickly. If I nibbled her ear, brushed my hand on her thigh, or started playing with her nipples, she would have a wet spot almost instantly and would immediately want sex. She would have at least one pair of spare panties with her at all times. (That's another story of getting her to soak them all in class.)

One night, we were finishing up a case study review on my couch, enjoying some wine, when I leaned over and started kissing her neck, and a hand went up her hoodie. She moaned, partly in desire and in despair.

"No - I have my period. I should have told you. Don't worry, I'll blow you."

I wasn't going to say no, but when she paused to catch her breath, she commented, "This fucking sucks. I get so horny on my period and can't do anything about it."

I was surprised and said, "Why not? Let's put a towel down and fuck. I'm cool with it."

She looked like a kid on Christmas morning. She practically ran to the bathroom to remove her tampon and then to the bedroom.

Between her natural wetness and some blood, my cock was gliding in and out of her. She was over the moon in pleasure. It's like her body's sensitivity was turned up to 11. She came from me rubbing her clit, from nipple play, and several times from fucking.

I was fucking her from behind and at one point I looked at my cock to see it covered in her grool and some blood. She was rubbing her clit underneath her and I said was going to cum, and she said she was going to cum, too. I pushed my thumb into her ass, which was already shining from her dripping pussy, as that was her magic button for a super intense orgasm.

At that point, I pulled out, slapped my cock on her ass, rubbed off as much of her juices and blood as I could, and then fired my cum on her ass and back. It was so visceral to see all those bodily fluids spread on her skin, and then I wiped my hands all over her back to spread it like body paint.

We hoped in the shower afterward to clean up, and I got her off fingering from behind against the wall while using the hand sprayer aimed at her clit.

After that night, we would have intense period sex every month, and she would have eye-rolling orgasms once she learned that anal and a vibrator would send her to another world.

Even after we went our separate ways, she would occasionally call me from a period fuck, and I was happy to help.