"Keith, I know that you didn't mean any harm, but I feel its necessary to tell you that there are some changes to my body I don't approve of and, regretfully, my trust in you is limited." You glance at Keith to try to take in his understanding but immediately realize you don't care. This being, formerly a he, is your slave and you simply need to correct any of it's misconceptions. "Android halt Keith persona immediately."
"Task Completed"
"Is it possible for me to modify Keith persona such that he is asexual except for being sexually attracted to me specifically?"
"Yes"
"Do so. May I specify the acts he wishes I perform with him"
"Yes"
"Well then, Keith will imagine with great lust, that I... [Specific fantasies]"
You realized that he may specifically like you, and not want any woman in particular as a sexual conquest, but still idealize feminine beauty... so should this happen again, you'd still become more feminine. "Damn."
"Android, please update the idealized version of myself for Keith persona to include, [...]"
"Please reactivate Keith persona."
"Keith, I want you to understand. You have disappointed me deeply because in using the keys on me, some of your desires for a feminine form effected me. I never [originally] wanted this."
Keith looked mortified.
"Therefore I have become the only thing that you can possibly feel attraction to, and demand you use the keys on me again. I was trying to respect your individuality as a former person but had to override some of your... rougher edges.. if you thought it was smart to use the keys against your master."
You dropped the keys on Keith and he initially dodges the like they were lava, though as he processes you words he picks the up, points them at you and asks, "Are you sure?" His throbbing erection painfully evident.
"Nothing stopped you from using them on me earlier." The implication that he stupidly felt he knew best was clear and the smirk as you said it. His face fell, unable to tell if you were truly angry, entrapping him, or wanting him to do it.
After 5 seconds of processing the situation, "Okay, here I go."
There was a flash and a second later you saw Keith shielding his eyes. You seemed like yourself but...