He asks her about her sex life a bit.

Felix stood and adjusted his clothes, Starfire and Diana also getting up and not bothering to cover themselves, modesty still a foreign concept to the former, and obselete to the latter. "So, Starfire, do you and Nightwing have a satisfying sex life?" Felix asked her.

"Oh yes, very!" Starfire grinned. "Though I am still learning about several of the customs on Earth. A few of his advances to start some fun still go over me."

"You mean over your head?" Felix asked, amused by her difficulties with human slang.

"Erm, yes," she blushed a bit.

"Do you have any areas of your sex life you would like to improve?" Diana purred, embracing Starfire from behind and cupping her boobs.

"Well, not really no," Starfire moaned. "I do wish Nightwing would engage in a threesome with me, but..."

"Well, baby steps," Felix smiled. "Besides, you two got something special, no need for anyone else to get involved in your own special times, right?"

"True," she smiled, and stepped away from Diana to grab her clothes. "I should go soon," she stated. "Nightwing will probably want to spend a little time with me..."

"Of course, you want my number?" Felix asked Starfire, who nodded. Once they exchanged numbers, Felix nodded, and told her, "Assuming Nightwing knows everything, I'm perfectly okay with you both discussing things. If you both can agree on some wishes, within reasonable limits, I'm sure Diana and I would be happy to oblige you both."

"I appreciate that, and I hope you enjoy yourselves greatly," Starfire nodded, before heading back upstairs and flying out the window.