However cool, cute or kind a partner might be, there are moments that a couple going out together suddenly look at their other half and think "I don't like this person anymore!". According to a Japanese survey entitled "The moment a love lasting 100 years cools off", regardless of gender, the answers that stand out from the top ten are examples of bad etiquette, such as "bad table manners", or opinions on moral aspects such as "littering, or "jumping the queue/cutting the line". Gut-level reasons - such as body odour - also enter the top ten. People who can't observe social rules such as "aiming to be on time" also appear to be a no-no, although this isn't in the top ten. Other reported turn-offs include "having a messy room", "tut-tutting", having bad handwriting", "taking games seriously" and "haggling over the price of things".
Reference data: Livedoor Research http://research.livedoor.com/QuestionnaireTotal2.cgi?research_cd=ifjihevocg1226705311(Survey period: 2007/03/15 15:00 - 2007/03/16)