biological factors that make you attracted to someone

No two people are going to agree on what's attractive and what isn't.

A study in 2018 found women with certain scents are more attractive to men. It turns out they were most appealing when they had high estrogen and low progesterone levels. This balance of hormones indicates high female fertility, the researchers explained, so it makes sense that men would find women more attractive while they are at this stage.

Fae told Insider scents can also take people back to a familiar time, such as the body spray their first boyfriend used to wear. It may even be related to something that isn't romantic at all, like the smell of gasoline, because it reminds them of feeling comfortable hanging out with their dad at a garage.

"It's really weird things that will attract people to someone, based on scent," Fae said.