(as) silly as a wheel Australia simile
If you say that someone or something is as silly as a wheel, you mean that they are very stupid or silly.
He was as silly as a wheel when he believed in the woman who took advantage of his gullibility to scam him twice.
Her idea of using water to extinguish a blazing flame that derived from the gas leak is as silly as a wheel.
Extremely stupid
A very offensive term used to describe an upper-class British man who is stupid or inexperienced
Stupid or crazy
To be extremely stupid; not to be alert
The origin of this idiom is not clear.
people often do irrational or foolish things when they are in love.
I and my boyfriend have decided to get married in the summer. I don't think that's wise, since we won't have enough money saved by then to set up house. But then, one cannot love and be wise.