Jill

"Hold on! I've only been a wizard for a day now. I'm still learning."

"Luckily, he has some sort of magical fact-checker. If he has an idea he knows instantly whether it's true." Apparently you're going to get help explaining.

"Not always. I've had a million ideas that didn't give me a yes or a no. Like I have no idea if I can do enchantments. It seems like I have to ask the question in my mind in the right way."

"He also uses up mana to do magic, and almost killed himself already by using up too much."

"So far, I know I can move things around, conjure things from their atoms in air, read others' sensations, and incredibly expensive healing."

Jill asked "How did you do the healing?"

"I just sort of willed it to be better?"

"That sounds really stupid. Like a sorcerer just dumping infinite energy into a wound to try to regenerate the flesh."

"Well, it was a spontaneous idea. And I'm not doing it again."

"I take it your mana comes from something sexual?" Jill had just jumped ahead and you stared, blinking at her for a minute. "Oh, come on. I know I seem like a prude, but I know Ashley and her friends. She brought one girl who loves magic and three who love sex. Plus Julie is walking around like your dick is practically still inside her."

Julie grins like she's about to announce just what's going on, but you speak first.

"Basically, I get mana for girls having a good time. It's basically how good she feels times how close I am times a kink factor and how much of the sensation is me. Like me giving oral sex is twice as good as getting, and a rubbing through jeans would be half of rubbing through leggings, and perversion gives bonus points for being into it or experimenting"

"I'm in. One condition. You try any experiment I can think of that might give me powers too. I've never actually had even a sexy kiss, which better be worth some bonus points."