Isn’t RD canonically gay with AJ? I haven’t watched beyond S5, so I only heard the memes, but I thought some people freaked out about the butch rainbow horse being the gay. (Though maybe they freaked out because RD+Rarity is OTP as Faust intended.)
I tell myself that RD is bisexual so I have a shot with her, but I’m delusional, or so the doctors tell me.
I just realized that top-to-bottom also solves the problem with smearing discussed in another comment. Your hand is moving down, away from the fresh characters. By the time you move over to the next line, the top is already dried. (Especially with the time it takes to fill a line with kanji, which are denser than Latin script.)