I actually can say we did that on purpose! We were smart enough for that. Doing something horny and thematically appropriate went hand in hand.
Not wanting to intrude or anything, but I felt the length of the scene was warranted. Put it in the context of Khenbish thinking back on a moment in time, a "missed opportunity", fantasizing about how his first sexual experience could have been, all the different things he wished he could try and all that. I specially like how the scene builds up, starting shy and exploratory slowly gaining confidence and gathering momentum for a satisfying climax.