Time for a change in the comfort zone.....

Step 1: Materials

Boxer shorts
Scrap material (Double the length of the widest part of the shorts.) Or you can use lace. Girl-li-fy it as much as possible.
Basic sewing:
scissors, measuring tape, sewing machine.

Step 2: Castration

Sew the flap shut.
Cut right across the seam going from one leg to the other.
Pinch up the excess, pin, and sew. Cut off any excess material.

Step 3: Hem

You'll need to cut around the bottom, making sure it's even. Place a small hem around the bottom. There will be 2 places where the material comes to a point; just sew those even to the rest of the hem.

Step 4: Fringe

Take your scrap fabric, which should be 4 inches wide, and double the lenth of the bottom edge. Iron, a hem one side.
Pin the raw edge of the fringe to the shorts' hem.
Gather the fabric as you pin so it makes a wave around the edge. Sew to the bottom edge of the shorts.

Step 5: Lather, Rinse Repeat

Ok, skip the lather & Rinse.

You can now wear your shorts - oops skirt. If you want to add more layers, repeat the process. The only difference is that you will cut the elastic waistband off, then pin the second layer under the first. Sew in place, and cut off the excess.