You went to the beach. It was a beautiful, sunny day, and a good amount of people there. Like a dummy, you left your swimsuit at home, but you saw a swimsuit machine. It was something new that they were doing now.

it only costs a dollar to have the machine. Give you a suit so you throw in a dollar and a bikini. Pops out a beautiful red one

Super embarrassed, looking around to see if anybody saw this, did you do something wrong?You just put it in the money, and it gave you a girl's suit. Curious, you try it on and immediately start to change into a girl very slowly.