壓下去就塌，沒有東西頂回來
這是核心畫面本身，講的是實際摸得到、壓得到的東西。
adjective · B2
Soft and wet, and having lost the shape or bite it should have, so that it falls apart into a thick paste when you press it.
糊爛的
核心畫面
One way to hold this word: press your thumb into something and nothing pushes back. A boiled carrot, a wet box, an old cushion, a worn-out button. Whatever held it up has gone, so it just gives way and spreads under your finger. English then lends that same feel to talk about love: the words go soft and sweet, with no edge left anywhere, and the listener sinks in the same way your thumb does.
可以想成：你用拇指壓下去，底下沒有東西頂回來。煮爛的紅蘿蔔、淋濕的紙箱、塌掉的坐墊、按壞的按鍵，都是這樣。原本撐著它…更多收起
可以想成：你用拇指壓下去，底下沒有東西頂回來。煮爛的紅蘿蔔、淋濕的紙箱、塌掉的坐墊、按壞的按鍵，都是這樣。原本撐著它的骨架不見了，所以一壓就往旁邊塌開。英文把同一個觸感借去講感情：話講得又甜又軟，沒有一處帶稜角，聽的人就像拇指一樣整個陷進去。三個用法都在講同一件事——該有的那個硬度不見了。From the word’s history
Wiktionary gives the formation as mush plus -y: like the thick soft stuff called mush.
Wiktionary 記的組成是 mush 加上形容詞字尾 -y，也就是「像 mush 那一團一樣」。這個字面意思正好就是核心畫面：壓下去會散開的一團。
Wiktionary etymology tree for mushy supplied in packet (kaikki:3f6f69a190036ae4:892299910:17168)
Two branches
話講得軟到沒有稜角
把「沒有骨架、一壓就塌」的觸感搬到說話和感情上：甜得沒有一處硬的地方，聽的人就陷進去。
adjective · B2
Showing or describing love in a sweet, soft way that is a bit much for the listener.
肉麻的