Of course they do! In fact, Zatanna wants futa on futa!

"...say, can you give yourself a cock too?" Zatanna asked with a mischievous smirk, and Diana snorted.

"Of course I can! That's not the part in question here, Mistress," Diana teased Zatanna. "What's in question is, do you wish for me to do so?"

"Duh! I wouldn't have asked if I didn't want it!" Zatanna stuck out her tongue at Diana, who smirked at her.

"Fair point," she replied, before casting the spell, and producing for herself an identical cock to Zatanna's. She crooned as her clitoris grew out into the erection, panting as it twitched.

"Mmm... That's so hot... Futas really are the best of both worlds for those of us who are bisexual, aren't they?" Zatanna quipped as she approached, and gently grasped Diana's new shaft, stroking it lightly.

"Unh... Oh yes, indeed, Mistress," Diana panted, slowly bucking her hips to and fro. "Able to feel both the pleasure of a man, and that of a woman..."

Zatanna grinned in agreement as she continued to slowly stroke Diana's temporary cock. "Not to mention, able to fuck like both of them..."

Diana bit her lip and nodded. "So... What shall I do with this new addition first, Mistress?"

Zatanna smirked as she continued to stroke Diana's addition. "That there is a good question, my lovely genie friend. We have so many options now... Hmm..."