You run up to the counter and pay for your new under garment, gladly enjoying your new loins. You hurry up and run home. Slamming the door shut and stripping down to just your undies. You manage to wriggle your long hairy penis through the front opening, watching it stand on end, reaching almost a foot in length, thick precum leaking from the head . You wrap your hands around your long, thick organ and vigorously run them up and down your shaft, quickly and ferociously, trying to reach the inevitable organsm that you long for. Finally you erupt in a full blast of seman cloaking your hand in your thick, sticky fluid. You can't help but moan at the sheer orgasmic force of it, it feels so powerful, almost primal in a way. You sit there in silence for a moment, gripping your fat cock, just hunched over, panting, until suddenly a loud noise rips through the silence. You release a loud, gassy and most of all, involuntary fart, filling the room up with your stench. Suprised you sit up. Then it happens again, you let out another loud wet fart and this time that's not all you let out, you feel a soft pile of shit come out with it, filling your underwear. Shocked, you rush to the bathroom and try to remove the undergarments, leaving a trail of shit as it leaks out of the rapidly filling up, underwear. You try to grip the elastic but it won't budge off your skin, it's completely attached, you grip the sides and pull, they still won't budge. You feel the shit drip down your legs, the smell quickly engulfing your senses, you begin to change more, both physically and mentally.