Sweat pants and a t-shirt

After you lock your door, you slip your boxers down your legs and kick them in the direction of your clothes hamper. As you're walking over to your dresser, you can't help but catch a glimpse of the reflection of yourself as you walk past your mirror. You stop walking and start to stare at yourself in the mirror, admiring the fruits of your labor at the gym this past semester. You finally took advantage of the free gym at your university, and the past several months have been the first time you've ever kept a new years resolution about getting in shape - you couldn't be happier with your results!

You began looking yourself over from top to bottom, starting with your short, light brown hair still messy with bedhead. You soon found yourself staring directly into your own hazel eyes, trying to unravel the mysteries that your own gaze holds. After your staring contest, and a few funny faces later, your gaze continues to shift down. Your muscular chest and arms look strong and powerful, and while you don't have six pack abs yet, you can definitely see a little bit of muscle definition starting to form. Your gaze shifts down once again, and you find yourself staring at your now very erect penis.

"God, I can't believe my little sister got me this hard..." you think to yourself, feeling guilty. Your little sister graduated from high school this past spring, just turned eighteen a few short weeks ago, and now you, her own brother, is thinking of her in the most lecherous ways. Trying to divert your naughty thoughts away from your sister, you give your shaft a few strokes before turning sideways to admire your body's profile. Standing at around 6.5 inches in length, you're certainly not the biggest in the penile department, but you are decently thick, and it looks proportionate for your body.

Moving your gaze south just a bit farther, you briefly take a peek at your babymakers. You can't say you've spent much, if any time looking at other guys' ballsacks to compare them to, but you're pretty sure yours are on the large side. You've always secretly been a little bit proud of their size and heft. You finish ogling yourself and head over to your dresser to pull out some clothes.

"Hmm, it's my birthday, and I want to be as comfortable as possible. Screw dressing up!"

You reach into some drawers and pull out a pair of soft, dark gray colored fleece joggers, a pair of boxer-briefs, and a t-shirt with the Captain America shield logo on it. You quickly throw them on and stand in front of your mirror again. You realize as you're standing there that the sweat pants don't do much in the form of boner control. You're now only rocking a semi, but it still forms a decent bulge in your pants.