Friend of mine moved to Milwaukee years ago, and started doing some house renovations. Called me one Thursday, wondered if he could please borrow my Nissan truck, sorry to impose but he needed to haul some supplies that just wouldn't fit in his Miata.
Offered to just swap vehicles for the weekend, he was really grateful. Picked up the Miata on Friday, drove it till Sunday. That's what we call a symbiotic relationship; he got his stuff hauled, and I had an awfully enjoyable weekend