Things I would do to a loli android:
1) Treat her like a princess. Buy her dresses, candy, toys, anything. Spoil her and make her love me unconditionally and depend on me for anything. Then one night I'll walk into her room at night while she's sleeping and start beating her with a baseball bat, and then I'll rape her. She'll be utterly shocked and confused, she'll scream at me to stop, unable to understand why is the most important person in her life attacking her like a maniac. Maybe she'll think I'm intoxicated or under some kind of magical influence. I don't care. I just want to see her reaction. The rape and beatings will go on for multiple days until she loses all hope of ever being released and realizes that this is who I really am. And then, and then I'll reveal that I've been doing this routinely for the past 4 years: nurture, love, create a memory restore point, rape and rollback. Her happy memories were simply stitched together. I want to see her face when I tell her that tomorrow everything will go back to normal and then she has no way to stop me.
2) Buy a second one and raise them like sisters, wait a few years until their relationship has matured enough and then throw them into a pit where they will be forced to fight successive waves of animals (chimpanzees and dogs mostly) who have been injected with powerful aphrodisiacs, using nothing but blunt objects. Defeat means rape. If they survive, I will order them to fight each other or face a silverback gorilla equipped with a juicy monster cock. The winner will be granted freedom. Androids should be much more agile and stronger than humans so this could be exciting to watch.
3) Information deprivation experiments. Erase all information about Planet Earth from their memory, and raise her in a concrete bunker deep below the surface. What would happen if you raised a child in a completely sterile environment, with no literature, music, games, colors or any knowledge about the Outside whatsoever? The entrance should be hidden somewhere in my room, where I'll be spending most of my day, but should she find out about the existence of an outside world, I could just roll back her memories 24 hours. Sooner or later, she'll start asking questions, such as "who built this place?" "How did you get here" and "where does the food come from?" and she'll make up her own answers when I pretend to not know. It could be entertaining.