My friend gave me this pair of boy style underwear to wear. She smirked when she gave them to me, and I thought it was because she wanted to see me in them. I put them on at home, look at my ass in the mirror. They look great! I miss one thing though, the mysterious bulge growing in the front. I get horny and start humping my pillow. It feels so good. Too good, I look down... what?! Is this a cock? I'm so horny I start stroking it. Then going harder, faster. Oh yes... I want more of this.