There might be some fan - fictions that touch on themes related to sex education in the context of the MHA world in an appropriate way. For example, it could be about how the characters learn about relationships, respect, and boundaries which are aspects of sex ed. However, it's important to note that such fanfics should be in line with the general ethical and moral standards of the fandom.
It depends on the specific situation and the character's personality. Some heroes might have moments of fear but overcome them through their determination and sense of duty.