He is a man who goes to the doctor because he has severe headaches.

The doctor auscultates him then begins to ask him a few questions:

- Have you noticed if your headache appears when you have drunk too much?

- But doctor, I do not touch alcohol, not even a drop of wine on holidays.

- Good, good. Maybe when you smoke too much, you should cut down on your tobacco use.

- Doctor, I assure you that I have never smoked in my life and besides the smoke makes me sick.

- Really? Well, it could be an excess of sexual activity. Do you suffer more after love?

- How? 'Or' What ? But since the death of my dear wife I have not touched a woman. I don't even look at them anymore

The dubious doctor scratches his head, his beard and finally a smile lights up his austere face.

- That's it dear friend, this time I found where these migraines came from: it's your halo that squeezes you too much.