Now you're going to expernience what it will feel like when I prepare your ass for my use. You may not like it at first, but I will condition you to become aroused during this procedure.
First insert your lubed pointer finger slowly. Give it a long stroke all the way in and out. Then replace it with your middle finger. All the way in, all the way out. I call this my "1-2" technique. Keep rotating back and forth for 24 repetitions, slowly increasing your speed as your asshole loosens up.
After 24 repetitions, insert the middle finger and leave it in. Push forward, towards your balls and try to feel around for your prostate. If you don't find it, that's fine. We have plenty of time to work on that. I'll just increase the length of your milking sessions.
After about a minute, go back to the "1-2" technique and repeat until your ass relaxes enough to stay open even when there's no finger inside. This is what I will be doing to you before your milking sessions. By the time you're done, your asshole should have so much lube inside it that the shower couldn't possibly wash it away.
If you feel you're properly prepared, you may reenter the shower. You may now use hot water. Make it extra hot.