Make the suit itself the restraint...

You see the sleeves of the suit melt together into a straight jacket holding his arms at the front. His legs also melt together, holding his legs tightly together. His eyes are covered and so is his mouth. You see how the hood tightens so he can´t move his jaw, then you imagine it even tighter across his lips. All you hear is a short grunt of discomfort from Stan as the hood gets even tighter.

His cock and balls are also encased completely in latex. The feel of the tight rubbery material seems to excite Stan who´s rock hard cock now strains against the latex. Then you get a naughty idea, you make a condom attatched to the suit go up his ass. Stan seems surprised at this sudden intrusion and fall over with a heavy thud. You wince a little but then come up with Another idea.

His straightjacket sleeves move to his back but still the same principle. His legs bend back and are soon attatched to his arms. A latex strap emerges from the top back of his head and joins the arms, pulling his head up.

Stan struggles to flip over onto his back as he is now laying on his erect cock.