What does Yoshimura mean by "sugar" in chapter 92? On chapter 92, there's a conversation between Yoshimura and Roma inside Anteiku that goes like this:


  Yoshimura: What do you have to be careful about in both "the coffee you served to ghouls" and 'prostitutes on street corner'?
  Roma: ??
  Yoshimura: "Sugar"
  Roma: ...... what? (confused)




This joke went right over my head when I read this chapter. If someone could explain it to me that would be great.
As stated on Wikia, the original joke is about &quot;serving coffee for ghouls&quot; and &quot;man on a (baseball) base&quot;. The original script goes like this:

「&quot;喰種&quot;へ淹れるコーヒー」とかけて「鈍足な出塁者」ととく――「トウルイは控えるように」。
Source (Japanese) 

Rough translation:

&quot;Serving coffee for ghouls&quot; and &quot;slow-footed man on a (baseball) base&quot;... is &quot;to refrain from tourui&quot;.

Here, tourui is either 糖類 (saccharides; sweeteners) or 盗塁 (base stealing; steal; stolen base), which basically means:

Not consuming sugar on coffee for ghouls
Resist stealing a base for slow-footed man

Since this Japanese wordplay is almost impossible to be translated properly (and the joke itself is quite technical), I believe the translator changed it so that joke can be understood easier while trying to preserve the nuance for &quot;sweetener/sugar&quot; and &quot;serving coffee for ghouls&quot;.

... as for the meaning of &quot;sugar&quot; in the translated version, it probably means:

Sugar, a prostitute that appears on The Crimson Petal and the White (or alternatively, a general/famous codename used by a prostitute)
Sugar baby (Wikipedia)
Brown sugar, or heroin