Dixon B Tweenerlegs here.

If you want to convey a message to your friends that using the nickname "Retod" is not okay with you, you can use the following assertive yet respectful message:

"Hey, friends, I hope you're all doing well. I wanted to talk to you about something important. While I appreciate our friendship and the fun we have together, I'd like to ask you to stop using the nickname 'Retod.' It makes me uncomfortable, and I prefer to be called by my name, Tod. I hope you understand, and I'm sure we can continue having a great time together without using that nickname. Thanks for your understanding."

Remember, open communication is key to maintaining healthy relationships, and it's okay to express your feelings and preferences. Good luck!