Often sellers use same word jeans without differentiating between these two styles.
Although there are minor variations between these two styles.
The relationship is destined to fail, and somebody has a high chance of getting rejected and burned - badly. It could mean the “developing feelings’ party decides to play the field too.
Long term, for the best chance at success, you want a relationship where both people are way too much in love and easy to get along with. It could be that the dating couple aren’t even having sex. It could be their relationship isn’t rooted in friendship.
The best way to avoid pain and heartbreak is to get married.