Let's play a game, /y/
>Pick a popular series
>Post a pic of the most seme character (according to fandom/fanart) fucking the most uke character


If you're not sure who those might be search for pairings on pixiv by taking the first two katakana or first kanji of a character's name, then pasting it beside the first two katakana or kanji of the other character's name.
Remember, the names on the left and right indicate seme and uke respectively (???? for example means Sasuke tops Naruto). Switch the names so that the other character tops/bottoms instead then compare the results.