Note: I have experienced this. In skilled hands, it is very difficult to hold still and not moan.
My mistress is nude and sitting comfortably with a glass of wine and a pad of paper on the table. I am standing nude and of course erect. Mistress has cuffed my wrists behind my back and attached a chain that is affixed to my collar. I cannot move my hands more than an inch.
"Slave, stand here. Don't move or make a noise. If you move or flinch, I mark down two strikes If you moan, speak, or whimper I mark down one strike. After, you will be over my knee and you will receive a spank for each strike. Do you understand, Slave?"
"Yes, Mistress." She puts a mark on the pad.
I gasp as she draws a single finger along the underside of my cock. She puts another mark on the pad.
"You aren't doing so good, Slave." I stay silent and still.
She raises a hand and swats my cock. I flinch. She makes two more marks.
She raises a hand and says, "Practice makes perfect." I steel myself to stay steady as she swats my cock again.
She uses both hands and dances her fingers on the head of my cock. She spreads her legs, giving me an eyeful of her pussy. She dips her finger into my pre-cum and uses it to lube my cock head. I strive to stay still and quiet as she continues the tease. My cock hardens; my balls swell. I so want to beg her to grab my cock, hold it tight.Maddeningly, she continues to circle the head of my cock then she flicks the ridge.
"I think twenty flicks will do," and she starts to count.
She spreads her legs further apart and asks, "How would you like your cock sliding in and out of me, feeling my vagina muscle clamp down?" I struggle to stay still and quiet. She squeezes my cock hard between her fingers. I gasp and fidget, melting into her grip.