Probably 'DearS'
It got tons of bad review, its sexist as hell, and you could find it on tons of top ten worst anime lists for it.
I would Guess A Good Anime For that Would Be Rosario+Vampire
KissXSis, Girls Bravo, Queen's Blade, Onegai teaher, Highschool Of The Dead,
Lots more.
TONAGURA
Yuji is one of the Most Perverted characters in anime.
GTO, hands down.
Naruto
its not a cartoon its anime lol and it has a small hint of romance
Yes read the perverted comments and the summary above the episode
school rumble
Naruto I guess
well, if you really wanna know watch it.
There are many, but Inuyasha is a long running anime with fighting and romance.
no
Shigatsu kimi wa uso and Nodame Cantabile are among the most popular romance and music anime.
its not a cartoon its anime lol and it has a small hint of romance
Yes read the perverted comments and the summary above the episode
There is no anime for 1/2 Prince. It's not even a "manga". It is a "Manhua" and novel. But the Manhua does have romance. It is a romantic series.
school rumble
yosuga no sora ^.^
Naruto I guess
no, there's no romance in prince of tennis at all. it's a sport anime/manga.
Ever heard of toradora
Try vampire knight or Rosario + Vampire: