Do try this at home: a brief style strap-on harness anyone can make.
Though it's not exactly the same as what you'll get from a store, this idea for a DIY full brief harness is a pretty nifty way to strap-on on a budget. All you need is a snug fitting pair of briefs, a rubber o-ring, and some basic sewing supplies. Add an o-ring compatible dong and you're ready to rock! Could there be a cooler rainy day craft project? We think not.