Speaking of love, romance and sex, here's a little post about how I think the MHA characters feel about such things:
MIDORIYA: He has no problem with wanting to go out on a date and be in a relationship, but he's extremely nervous about asking somebody out. Also, he's not too sure about marriage.
BAKUGO: On the surface, he seems as though he hates the idea of romance, deep down inside, there are girls he finds attractive, and he just wants somebody to love him and kiss him and huggle him.
TODOROKI: While he feels attraction to certain girls, he has trouble comprehending whether someone is genuinely attracted to him or if they're just being friendly with him. Nevertheless, he wouldn't mind going out if he found the right person.
URARAKA: Loves the idea of romance and hopes to have a family of her own someday.
IIDA: While he's OK with romance, for him, it's not a huge priority. Like Todoroki, though, he could see himself going out with someone if they were the right person.
ASUI: Owing the fact that she had to raise her siblings by herself, she loves the idea of getting married and having children of her own, but she'd rather get other priorities straightened out, too.
KIRISHIMA: Loves going out with girls, but could never see himself getting married.
KAMINARI: Feels the same way as Kirishima.
MINETA: He's not so much interested in romance or relationships so much as he is in sex.
YAOYOROZU: Loves going out with guys, but would only get married if she found the right guy.
TOKOYAMI: The idea of romance and dating actually causes him to blush. Nevertheless, he would definitely go out with someone if he liked them enough.
ASHIDO: Loves going out with guys, and while she's not averse to getting married, it's not a huge priority for her.
HAGAKURE: Feels the same way as Ashido.
AOYAMA: Not really interested in romance or sex because he feels that no girl could handle his sparkliness.
OJIRO: He's good with the idea of romance and dating, and he wouldn't mind getting married, but sex makes him nervous.
SERO: Loves going out with girls, and while he'd love to get married, he'd much rather wait.
SATO: Loves the idea of going out with somebody because then he can bake his sweet treats for them.
JIRO: May seem uninterested in romance, but the truth is, she would go out with somebody if they were the right person. However, she doesn't have much - if any - interest in marriage.
KODA: Like Deku, he would love to go out with somebody, but is extremely nervous about asking somebody out.
SHOJI: He would love to go out with somebody, but he fears rejection because he feels as though people would think his Quirk was too weird.