"Why do you bike without a bicycle helmet?"

Translation: Hvorfor cykler du uden cykelhjelm?

[Synaestheisaa]

Probably because Denmark has excellent cycling infrastructure and didn't allow an automobile-centric culture to shift the responsibility of driving safely onto vulnerable road users.

[.Joanna.]

Because this Playmobil bike helmet is only a prototype and not for sale.

http://metro.co.uk/2016/10/03/someone-made-a-lego-hair-bike-helmet-and-everyone-thinks-its-awesome-6168247/

[DomEiben]

Odd English, I would say "Why do you ride your bike" or "why do you cycle", but never "Why do you bike".

[ilmolleggi]

fordi det er ikke sejt!