It is for the Greater Good
He had come for his revenge on the Gladiators.
He had killed a significant number of Gladiators to get to E666 and D7007.
Lenny wanted to make their deaths painful and therefore tortured them slowly and dearly.
Especially D7007.
Lenny really scarred his body with the tender methods he used to deliver significant attention.
Lenny had inserted a pincer into D7007's ass, slowly drilling it in.
The man had screamed and begged, but Lenny had been most unwilling to stop.
The Pincer expanded the man's asshole to nearly impossible degrees.
With the way Lenny had shoved it up his ass, D7007 would have either died from sheer excruciating pain or from the excess loss of blood.
It was the timely arrival of Athena, who at that time was known as A222, that stopped him.