Quite the opposite of beer goggles.
Do you have very high standards when it comes to love?
Well, turns out, you might just be tired.

No, really.. a new study has found that sleep deprivation causes us to perceive people as less attractive.
Researchers from Uppsala University in Sweden used eye-tracking technology to carry out the study.
They were able to detect what a person is looking at in real-time and the team studied 45 young men and women.
According to StudyFinds.org, participants spent one night with no sleep at all and one night with an eight-hour sleep opportunity.
The morning after then, their eye movements were measured.
Senior author Christian Benedict, an associate professor of neuroscience said they found that sleep-deprived subjects rated angry faces as less trustworthy.
While people found healthy-looking and neutral faces less attractive.
He said that it "indicates that sleep loss is associated with more negative social impressions of others.”
And he reckons this could result in less motivation to interact socially.
Basically, when we're tired, we spend less time “fixating” on people's faces, meaning we often misinterpret emotions and expressions.