He does have something to add!

"Hmm... That's good... But let's add something into that, shall we?" he suggested.

"Go ahead, Master!" Rias chirped.

"What if I wished to be able to tell what a girl's feelings towards me were just from a glance?" Issei then asked Rias, who giggled and considered.

"Well, given the general opinion of most of the female student body at Kuoh, I think you might find that would have some slightly depressing results," she teased him. "Though others might be more perverted than they let on," she added with a shrug. "A lot of people are. Still, most people have a dim view of open perverts..."

"...you know what, I still want that, let's go ahead and add that to the wish," Issei nodded, and Rias beamed.

"Yes, Master!" she nodded, and once he had made the wish, she snapped her fingers, and he tried it on her. He was immediately blown away by the depths of love and devotion he felt from her. "...whoops, probably should have warned you about that potential issue," Rias admitted sheepishly.

"Gah, that one was like looking into the sun..." he grumbled, rubbing his temples, and she laughed at him.

"Being a genie does expand my capacity for pleasure and emotional well being to something well beyond normal limits," she replied. "A higher state of being, basically. I'm just a little bit shy of a god now. Though I do need a mortal owner. So, shall we head to school?" she suggested.

"Yeah," he agreed, and they headed out. Sure enough, he was a bit disappointed by what he saw in most girls. Most did find him somewhat cute, but they also judged him, and judged him hard for his perverted tendencies.