I hope the weather is nice, wherever you are: Pump your nipples to the bearable maximum. Insert a small butt plug and put pegs on your nipples. Get dressed, no underwear, and go for a run. Run for about 30 minutes and let the pegs switch sides every five minutes. Enjoy and don't get caught.
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I just started writing some erotica...
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Disclaimer: I'm always happy to give tasks to willing players within their likes and limits or - if it's meant as a punishment - dislikes and soft limits. Please understand that these are only suggestions and you don't have to do anything. But if you do it, I'm always happy to hear how it went.
"For any given kink, either nobody does it or more than one person does it." (Ugol's Law)