How to make your own simple strap-on harness: a photo guide!

First of all, to establish my dorky maker cred (as if that needed doing), this is the bed I sleep in every night:


Oh yeah--it lights up.


It lights up by remote control.


Anyway. Let's get to the fun part. Er, the part where you have fun.

How To Make a Thong-style Strap-on Harness

Materials
All you need is:
84 inches of 1-inch-wide nylon webbing

Obviously this could change with body size and shape, but the design is very adjustable, so the measurements I used should fit most people with a 42-inch waist or under.

Fittings for the webbing (you can get these at Strapworks and similar retailers):
2 side-release buckles
3 friction slides
1 O-ring

I used a 2-inch-diameter ring, which holds smaller dildos snugly, but if you want to wield a very girthy cock you might have to go up a little in size.

The only tools I used were a lighter and a needle and thread.

Construction
Cut the nylon webbing into four segments:
45 inches for the waistband
25 inches for the crotch strap
Two 7-inch stubs for the buckles

Use the flame from a lighter or candle to sear off the edges to keep them from fraying. Be careful; one pass through the flame does it. Extended toasting will release nasty fumes and melted nylon, which could give you a horrible burn, which I learned the hard way.

Stitch the end of the crotch strap to the center of the waistband. A sewing machine would be nice for this, but I just stitched it by hand, sewing a box around all four sides of the overlap as well as an "X" shape inside. For comfort, this should be on the outside of the waistband, away from your skin.


Attach a "male" buckle half and a slide to each end of the waistband. Keep in mind with each of these steps which side of the waistband will be toward your skin; the view here is how it should look from the outside.


Use the third slide to attach the free end of the crotch strap to the O-ring.


Take each of the two stubs, fold about an inch over the O-ring, and sew it in place.


Attach the "female" buckle ends to the other ends of the stumps, again folding over and sewing in place.


Fit
(The photos for this section didn't come out well, but they should give you a general idea of where the fittings go, at least.)

With the ring facing forwards, just click the buckles shut over your hips. Fuss with all three slides to get it symmetrical and snug.
The front should look like this:


And the back like this:


Now unbuckle. Get a dildo with a broad base or "balls" on it, thread it through the ring, buckle back up, and ride 'em, cowboy.