Puts you in chastity

Gingerly, Sophia holds your swollen cock. Her hands feel soft. You resist the urge to buck your hips, clenching your fists and forcing yourself to stay still. Your friend holds your cock lightly for a few long seconds before slowly stroking it up your length until she gently cups the head of your dick. She pauses, and you realize you've started holding your breath. You don't want to do anything that might upset her, as long as she keeps touching you. She bites her lip, eyes never leaving your cock, and her hand slowly slides back down your length. You breath out deeply, groaning in frustration. If you were alone, nothing in the world could stop you from grabbing your cock and jerking yourself to a powerful orgasm. However, Sophia has control right now, literally. You wonder how long she'll keep this up.

"Look how needy your little friend here is..." she says breathily. "I bet you want me to give you a handjob so badly right now, don't you?" You nod earnestly, "mmm-hmm!" Sophia smiles openly. "No wonder you were so quick to get this implant. If this is how horny you can get, of course you'd want complete control over this hard dick." She starts stroking you rhythmically, making it last an agonizingly long time, and you moan and lean back. "I think though," she continues, "that you never really wanted to have control yourself, hmm?" Your brow furrows half in confusion, half in frustration as your erection strains against the invisible bonds. She smiles mischievously. "You must have gotten this little toy to help your problem here. Your horny problem. And the only way to do that is to give someone else control. Someone else who can help you tame this little beast, right?" You aren't sure what she's talking about, but her hand feels so good. Still dutifully sitting still, you groan out "W-what... unh... what do you mean?"

Sophia is looking at the phone now, tapping with her free hand. "Well it's obvious to me now. You have a bit of an addiction to your cock here, and this implant was to help you fight that addiction. You must have given me control because you didn't have the willpower to do it yourself. I mean look how **** your dick is." You don't have to look to feel your dick twitch longingly as her hand recedes again. Looking at your friend in frustration, you're met with a determined look, but one that's almost filled with... pity?

"This is for your own good," Sophia says, and before you can make a move, she taps a final button on your phone.