This troper's friend and his HeterosexualLifePartner snuck out one night to go skinny dipping. They had just made it back into his room and dried off (though they were still a little damp...) before his mom walked in on them both, completely naked. They freaked out and started to
make up two different excuses for why they were naked at once. They're straight as hell, by the way, it just took a little time to convince her.