for when the spirit is willing, but the wallet is week
That's a pretty good idea.
Someone told me in the past to take (not zip lock ones because they are too thick/stiff) but a 1 or 2 qt. plastic bag...some vegetable oil, and some dishtowels.
Put yourself in the bag, put some oil in it to make it super slick, wrap the towels around the schlong/bag for cushion and then maybe wedge that in between some cushions on the couch. Almost same thing as video.