I kinda just stumbled into the sink thing when I started exploring randomly (like I normally do) and was surprised when something happened XD
Though if you do need to check which sink, I think it was the guy-who-upset-his-wife's house. He kinda has a pumpkin head. Did his wife put his head in a pumpkin? Sounds like he could have his own story lol
Also, I love how that lady on a date technically doesn't give a bad ending no matter what you do :P