Pool party experience.

William was 45 years old. My two of his nieces wanted to go to a pool party. Thou he basically trusted them. But he did not think that they get drunk or in some kind of trouble for someone else. But they did want a 45-something uncle to tag along, so they had a simple solution. To solute it. Both were powerful mages. So, William was transfigured to a hybrid copy of both his nieces.

So, he could watch them, and be in disguise too. But he had had to wear a bikini like every other teenage girl there.
So, William is still nervous about him being a teenage girl. Plus, the fact he feels half-naked in a bikini.
So, an hour later Williams's nieces told him to loosen up, and a few drinks later, William started to be more, and more comfortable as a teenager, and slowly adjusted to the fact that he was wearing a bikini. William was starting to enjoy himself. What was a bit strange at first, he hated the fact that he was a teenage girl in a bikini? And the fact that a lot of cute boys when looking at him. And now he's hoping for one or two cute boys that would come over and talk to him. And maybe it will be more.