Bobby Pins - Crimped side UP or DOWN?

[Rouge]

It didn't stick in my head at all. I couldn't even feel it. And it kind of made my hair look better. Can't explain it... you gotta try it!

[~Hestia~]

So giving this a go! Always gone with crimped side up in the past.

[Enchanted]

I always used them crimped side up until I saw that pin on Pinterest. Mine would always fall out too until I tried the "right" way and haven't had any dramas!!