Hydrogen/Oxygen/Hydrogen
There is a grin on Oxygen's face as he unzips his pants, pulling his already hard cock out in the open. He can see both Hydrogens hesitant to do anything. The identical looks of confusion on their faces only serve to excite him more. He motions at them to come forward, and when they come close enough, Oxygen gently places his hands in their hair and guides their heads lower and lower to his lap.