Your swimsuit is less... suitable

You’re confused by the comment for a moment until something weird happens. The netting in your swimsuit becomes tighter... then the swimsuit itself. You jolt up and look down to see your board shorts become spandex and inch up your legs, then the top of the swimsuit expands up your chest until it reaches your pecs, forming a strap on either side of your neck. You jump up. Instead of your board shorts, you’re wearing a tight blue girl’s one piece swimsuit. The kind that competition swimmers wear. You look around and see a girl on the beach wearing the same thing, that must be wear Katie got the idea from. You turn cherry red from embarrassment, the bottom is tight around your crotch, which bulges out.

“Come on, ill change it back when you get it”, Katie says, motioning towards the ocean.

“I... I... change me back now!” You demand, desperately attempting to shield your manhood.

“All you have to do is swim with me!” Katie laughs, “unless of course... you need FURTHER motivation”