Stories where a character time travels to transform people

[Poopz42069]

Something like this https://www.youtube.com/watch?v=yLfGhdjrj4w
Is there a story where a character time travels in the past to physically or mentally transform a person in the present? like going to the past to give them a eating addiction or turning them into a nerd by getting them addicted to nerd stuff

[Perplexed]

Weird World Captions made a great story about this before they closed their blog, if anyone kept that saved.

[Nobody14]

viewtopic.php?f=45&t=7168

It may not exactly be the way you were thinking of, but Audipwr87's What's My Age Again features altering things in the character's timelines that cause them to change in various ways throughout the story. From shrinking, fattening, new fetishes, pregnancy and more there is plenty there.

[nymphoandrea]

Here is a MTF story about accidentally transforming yourself.
Time Effects by Jennifer White. http://www.storysite.org/story/timeeffects~01.html