[The hum of approval was rewarded with an identical twin, vibrated through the others length as he took him a little further in. For now he'd take his time, in part to work Helix up nice and slow but also so he was absolutely sure he wouldn't get sick or something whenever he ended up taking him in full.
He fell into a steady rhythm of short bobs, tongue moving along the underside of the head and lapping over the cleft. Meanwhile his fingers sank lower - by now he was pretty sure he wouldn't be able to use them much and so he opted for caressing the others testicles instead, fingertips carefully brushing over the smooth sac. ]