Energizer bunny

[Renato]

someone with seemingly [unlimited] [energy] and/or [endurance]

[Sarah]

he [keeps] [going] and going and going and going and going and going and going and going and going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going andand going and going and going and going and going and going and going going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and goingand going and going and going and going and going and going and going

[Julian]

Someone who will never quit trying. They wont give up. Much like the [Energizer] [Batterys] Mascot, they just [keep going] and going and going and going....

[Oralee]

A male in his teens or early [tweeties] who is either unexperienced with sex or just lacks any form of technique. He just [jabs] in and out hard and fast with no concern for [the pleasure] of his partner.

[Raeanne Dimick]

A [perpetual motion] [machine].