My pleasure...
Gosh you look so delicious sat there with your cock twitching and jerking like that. I love knowing I can turn you on so. I think it's time now to experiment a little with the butt plug, do you?
So, sit back in the chair and put your feet up on the desk. Get your lube and coat your balls with it, get them good and slippy, just like your cock is. Feel good? I thought so.
Now drizzle some oil onto your forefinger, yes, thats right. Now slide that finger down between your arse cheeks and let it circle gently round your arsehole. Oh, good boy! You're a quick learner aren't you.
Now press inwards slightly, but keep on circling around it. Feel yourself widening up a little? That's good. Now keep doing that until your finger just slips inside. That's right, it'll just happen quite naturally, just go with the flow. What picture would you like to see next, I wonder. Should I show you just how i stroke my pussy? Or maybe something not quite as rude - what do you wish for?