Man, I'd fuck the shit out of that armpit. Especially with the white blemishes around it, implying she was sweating and letting some steam out. The sweat makes for easy lube as well. There's only a few things in life that turns me on more than sweat. This armpit obsession has actually been a real issue in my life. I've got files of various anime armpits in my computer. Hairy ones, trimmed, nude, and sweaty. Few of my previous girlfriends had broken up with me because they would always wake up with my dick in their armpits. I could never figure out why. One time, I woke up in the middle of the night to find my sisters armpit wrapped around my dick! I must've been sleep walking, searching to put my dick in an armpit. I should've left, but it was in the middle of the summer and she was extra sweaty. I couldn't resist. My hips were moving on their own! She was in weight lifting, so all that muscle was enough pressure for my dick. I felt like I was in heaven fucking this armpit. I could smell my sisters stench on my dick. I was surprised on how heavy of a sleep she was. Until she admitted she was awake the whole time. I begged her not to tell father. But she explained that she had a "getting fucked in the armpits while fake sleeping by a sibling fetish." I thought that was a pretty targeted fetish towards me, except it wasn't. That's when I discovered that my second sister has been fucking her in the armpit as well. I haven't washed my dick since.