Why not both ?

Max had other things to try. He was curious about the limit of his power.

"Can you come a minute ?" He asked Miko.

She followed him and he joined Lucia.

"Hi, Miko !" The later said.

"Hia, Lucia !"

"I dare you two to make out." Directly asked Max.

And they started making out like it was perfectly normal. So, it worked on more than one person at a time. He then went on another test. He texted Lucia "I dare you to take a pic of your tits."

Lucia looked at her phone and did exactly that. While saying "All of that is easy, you should raise your game !"

"Ok then," Max said. "I dare you two, that every time it's just us or me and one of you in the house, you get naked."

"Sure ! Still easy !"

"Oke !"

And both girls took off all their clothes, standing naked.

With that, Max would see how long the power last. But still, Lucia was really nagging him on the easy part. So he tried something harder, something impossible in fact.

"I dare you, to turn into a black girl."