Phase 1: Collect Underpants, Phase 2: ?, Phase 3: Profit

I can't admit explain why I ended up searching for this on the Marketplace today. With only the 'General' maturity level checked, search only found the clean ones. The used ones only came up when the 'Adult' maturity level search preference was checked. Interestingly, the dirty ones cost more. But since some of the work is done for you (ewww! eww! ewww!), I guess that makes sense.