...And then suddenly, Metalman, all embarrassed, shily unzips his cute, little, black latex suit and spreads his asshole to let the buff and strong Chibi have a little peak. 
Chibi gets all flustered, as his humongous c*ck rises...
His massive dick craves that adorable pink, tight anus of his, as the blood flows through the veins on his penis, making them pop. 
He unzips his pants and pulls his dick out. Metalman angry at himself for being like this, bites his lip as he looks away. The muscular Chibi abruptly bends Metalman down and as he is about to thrust his dick inside his cute asshole, Bot 4 opens the door. 
He is shocked. Shocked and aroused. The scene excited his male genitalia...