Aqua Sex Share definition Flag When two people have sex in the water. As Jack got in the hot tub, Jen got in. They were both EXTREMELY horny!! So they wanted sex in water, and it became... "aqua sex". Aqua Sex by HornyHottie123 December 27, 2011 0 0 Get merch Get the Aqua Sex mug. Buy Now — $32.95 See more merch