Ok here is a unbiased opinion, backed by some science!
yes,there are sexual stuff out there.
is it suggested in the above meme? no any profanity or dirty talk so it passes.
was there any reference to sexual activities? no, ma'am,sir or non binary squirrel.
is everything about dating sexual? no, but there is that aspect to a relationship with another person. I can see where both sides are coming from, Neko is worried about the sexualization of underage characters, which is understandable given content that can be found on the internet and MobGodGaerin MOD is also making good points, shipping is not sexual in many contexts (Like this meme)
I think we should just all relax and breathe and try to come under a agreement that we all are alright and that this isnt sexual and the sexualization of underage character is right but unfortunately it will happen and we must remember that it is all fictional, no Bakugo Katsuki And Kirishima Ejiro are dating (Unless someones is actually named that which dang your parents are time travelers)
and on the subject of attraction, VespaDue. I couldn't find an exact age but I did find some interesting info!
"Confirming that the experimental manipulation had created high and low levels of arousal, White and his colleagues found that the heart rate and other signs of physiological arousal were higher for the participants who had exercised longer. They did not find that the arousal created by running in place for 120 seconds increased or decreased liking directly, but they did find an interaction between arousal level and the attractiveness of the woman being judged. As you can see in the following figure, the men who had been aroused by running in place liked the attractive woman more and the unattractive woman less than the men who were less aroused."
You may read the rest of the article at: https://opentextbc.ca/socialpsychology/chapter/initial-attraction/
Omg my fingers hurt.