In the town where my wife lived when she was 19 were twin boys, identical twins, she said you just could not tell the apart even their voices were the same.
One of the twins got to know her and asked her out so after going out a few times they would kiss and do a little petting, and one evening when they were in her parents house, they had gone out, she said she ended up with her tits out and knickers round her ankles as he played with her fanny and stuck two fingers in her. She didn't let it go any further although she did suck on his cock.
The next night same again but round his house, knickers down and fingers inside when she asked him about something that he said the night before when by his answer she realised that it was the other twin! What a good scam they had going, she said that they had tried that with a load of girls in the town.