They took a foot each and massaged as best they could, though they were so small in comparison with Don's feet that their massaging didn't have much effect in easing his aching feet. Still, it was turning him on seeing the little men attempt to give him a foot massage.
Don decided it was time for the real fun to begin. He was desperate to see the little men getting off, using his giant body to pleasure themselves. The thought of it made his dick grow thicker and harder.
"So you'll do anything I want?" Don said.
The little men stopped their task and looked up at Don wondering what was coming next, but both turned on by massaging Don's massive feet.
Don said "I want to see you both ride my feet and hump them until you shoot your loads all over them". This reminded him of the horsey game he used to play with his dad when he was younger - he would climb on his dad's foot and his dad would bounce him up and down until Don nearly peed his pants.
Jim and Matt were very aroused and began to clamber up Don's ankles to take their position astride his feet. They faced Don, sitting on his feet. He could see their hard-ons and was desperate for them to shoot their loads all over his feet. The two little men started to jerk off, slowly and in rhythm. They seemed a bit shy, so Don bounced his feet up and down a bit to help them find a beat. He could feel Matt starting to grind into his foot, riding it between his legs as he jerked off. Jim too was grinding on Don's foot and Don kept up the bouncing, seeing that both men were getting off on it. Don reached down to his own dick and began jerking off in time with his foot movements. Jim was now throwing his head back, riding Don's foot like a rodeo, rubbing himself up and down the length of the foot. Matt had stopped jerking off and had pressed his whole body against Don's foot, humping the top of his ankle furiously. Don began jerking off faster and faster, feeling the cum rising bit by bit up his shaft.
He began lifting his legs up and down alternately with the little men on his feet, sending spasms of pleasure through their bodies. Jim held on tight, getting off on Don's foot and grinding his ass into it, until he couldn't bear it any more and he shot his white load onto Don's ankle and lower leg. Don felt it seep through the sock and knew he was close to cuming.
Matt turned himself around so that he had his back to Don, and lay himself along the length of Don's foot, grabbing onto his toes. Don kept bouncing his foot up and down as Matt rubbed his rock hard cock along Don's foot, his legs dangling down either side. The bounce of Don's foot made pleasure shoot through his body and he came, humping and grinding hard against the giant's bouncing foot. It became too much for Don and he lay back as his giant white cum shot from his dick onto his stomach, lifting his legs up as he spasmed with pleasure, the little men holding on tight and enjoying the remainder of their ride.