ridiculous superstition in your country

I am interested in some ridiculous beliefs in your country.

I have some here:

1. Girls are not allowed to whistle under the roof of their house otherwise they will create an unhappy household or have an unhappy marriage or something

2. Girls used period to wipe their face when they get their first periods. Rumored to give them acne free face.

3. Non virgins girls have sagging blueish skin tone.

4. There are love spells. To get rid of the spell, people would boil wooden cutting boards and let the 'love bound' person drink it.

5. Not allowed to cut hair or nails at night fearing demons will come to collect it or some other mishaps.