He gets pretty creative!

He thought about it for several minutes, turning some ideas around in his head. "Okay, first... I wish, if I were to focus on a student, I would be able to intuitively know all of their interests and skills, including the sexual ones, and where their potential is in all fields, including what they would most enjoy in terms of sex."

"Granted, Master!" Sothis grinned as she snapped her fingers. "What would you like next?"

He paused and considered for a bit. "Well... How extensive are your powers over time?"

She blinked. "Well... They're pretty extensive, and with my Sex Genie magic, I can probably fine tune it a little more if you have enough of a sexual motive... We shouldn't push it too far though. Divine Pulse can only be used so many times in a day, and only turn back time so far for a reason. It messes with the fabric of reality if it's pushed too far. My Sex Genie magic can mix with it to make things more stable, but only to an extent."

Byleth nodded. "Then... I wish you also had the ability to pause time, but allow me and anyone else I chose to be able to move freely, so I can have more time to study, train, and have sex with others. And that I or anyone else I had moving didn't age during the time frozen," he explained.

"Oh, that's a good wish!" Sothis smiled, and snapped her fingers. "Granted! You'll be able to freeze time for three hours per day now! Four if you forgo any use of Divine Pulse!"

He nodded. That would certainly help. "That's about as good as I can hope, I take it?"

She nodded. "Sex Genie magic is extensive, but time is pretty difficult to mess with safely without something specifically designed for that," she told him. "If I didn't have some degree of power over it already, I probably would only be able to get you one safe hour a day." She then leaned in towards him, a sultry look on her face. "How about we use one of those hours for some... Fun?" she purred, trailing her fingers over his chest.