This does put a smile on my face refers to a memorable quote from the Avengers: Infinity War Official Trailer, uttered by Thanos.
The expression may be used independently, as well as with a screenshot from the trailer, depicting Thanos with a slight grin, usually associated with phenomena that arouses excitement and happiness in people.
The Marvel Studios’ Avengers: Infinity War Official Trailer, which contains the line, was uploaded to YouTube by Marvel Entertainment on November 29th, 2017.
Screenshots from the trailer have been used since early 2018, since before the film premiered in April, 2018.
However, the first instance of the meme being accompanied by the line “This does put a smile on my face” can be traced to the r/ThanosDidNothingWrong subreddit, posted on July 31st, 2018.
Not long after the first Reddit post, the meme would emerge on other subreddits, such as r/DankMemes, r/MarvelStudios and r/WholesomeMemes.
By May, 2019, the peak of the meme’s popularity, “This does put a smile on my face” would be used as a standalone expression on Twitter, while appearing on image macros on Instagram and Reddit, while also appearing on GIFs as well as TikTok content.