"I am very, very horny, Mistress. My skin crawls I am so horny."
You may lie back.
"Thank you, Mistress."
Imagine, if you can remember what it feels like, having slave boy touch your skin. Caress your breasts. Gently bite the inside of your thigh...
"Mmm...yes, Mistress, that would be very nice. That would be wonderful."
You are clenching your thighs, so I guess I've struck a nerve - so to speak.
"Yes, Mistress."