Yes, he can

Swap sexualities? What a weird notion. Josh, rolled the idea around in his mind. What would that even be like?

Well, there was a simple way to find out. All he had to do was concentrate and...

He felt the now almost familiar warm tingle of a change, this time focused in his head.

"Uhn, wait, what are you doing," Holly gasped, feeling the change too.

"Just what you asked," he blinked a little surprised by her reaction, "I swapped our sexualities..."

"You did what?" Holly demanded, her voice shrill with alarm, "That was just an example you idiot. I didn't mean for you to turn me into a dyke!"

"Oh, right..." Josh blushed a little, embarrassed about jumping the gun.

Still, Holly's attitude irked him. It was a simple misunderstanding, and he would have switched them back if she'd asked nicely, but now she's being kind of a bitch.

He's tempted to leave the switch in place and make her play for the other team for a while...