Very small

A furious shame spread of Haku's body when he saw the purple-haired kunoichi use her hand to hide a smile. The feminine boy never liked to show his tiny dick to anyone, let alone a woman, for fear of this exact reaction. He knew that it was small and that women liked them bigger, and so far it had been the biggest hurdle for him to overcome to start a relationship with another person.

"Alright. Guess the deal's over, right? I'm out," Haku almost growled as he reached to pick up his wet clothes again in shame. Before he could do it, Anko was already on him.

"No," she purred with a smile. "I think it's perfect!"

"Perfect?" Nobody had ever called his little penis perfect. Most women had just giggled and left him humiliated.

Anko nodded. "It's perfect. Now, let's get you a nice hot shower and into a change of clothes." Her house was more luxurious than he expected, but she was a jonin. They made more money than the average shinobi, and a lot more than a civilian like Haku. Her shower was big enough to be his now burnt down room. He was indulging his eyes on the wealth so much that he barely noticed as Anko raised his hands and locked them with two manacles hanging from the shower's ceiling.

"Hey!"

"Oh, shush, my little pretty," cooed Anko, fixing another set of manacles around both his ankles. "Let your mistress help you clean out." She brought back a shower head and several cleaning materials and then proceded to soak him in warm water. "Such a beautiful little thing. I'm going to be taking good care of you. First, let's take a little shave."

Haku had very little hair below his head, yet what little he had, Anko made sure to take off with surgical precision, particularly around his genitals. She followed that with scrubbing him from head to toe with a soap lathered sponge until he was squeaky clean. She used girly products on him, and by the end Anko dried him with a towel before leaving him to get something else.

He was about to use a jutsu - something he hadn't done in years - when he felt something prod his back.