Eliot was reacting swiftly to Sam's lips and tongue. Even though the hot water diminished the specific sensations, what Sam was doing brought him to heightened sensitivity that made him aware of every current that brushed past his skin. He filled very quickly under those circumstances, and his lips parted to pant lightly.

It was good, it was damn good, and if Sam was rusty at this, to Eliot who hadn't experienced a blow job since before death, he couldn't tell at all. Even before, the ones he experienced couldn't compare to this underwater one that Sam was giving him.

"Ah, fuck..." Reaching down he placed one hand on Sam's shoulder, the other naturally cradling the back of Sam's head, and used his iron control to not put any pressure in either location. He needed to hold on and caress, let his partner know he was enjoying their efforts, and when he was getting near, which was really quickly enough that he was actually slightly embarrassed, Eliot pushed at Sam's shoulder to give him warning.