Ok... I don't really watch TV that often but I can't help but notice the problem with one of the TV advertisement shown. I saw this while watching 周日八点档 in Channel U. I tried to look for it on youtube so I can save some explanation but I couldn't find it. So I'll try my best to describe it here. Let me know if you manage to find it online.

Whisper Sanitary Napkin TV Advertisement
In this advertisement, a computer animated in the shape of an umbrella can be seen dancing around, in the rain, while hopping and singing happily in a girl's voice. After a while, the 'camera' brings us to a higher angle to show us the 'umbrella' is actually a sanitary napkin placed with the absorbent side up. So the napkin absorbed all the 'rain' and kept the imaginary girl dry. Imaginary as the umbrella was dancing with no one inside.

The whole idea is to show that Whisper's pads would keep a woman happy and dry during their period.

But do you know the fundamental science behind an umbrella is at the opposite ends of that for a sanitary napkin?

Science of a sanitary napkin
It needs to be hydrophilic, or love water/liquid. It has to be absorbent to keep a girl comfortable and dry during their period. It has to prevent fluid from flowing out of the pad and be exposed to the air or worst, stain any fabric.

Science of an umbrella
It needs to be hydrophobic, or hate water/liquid. When liquid comes into contact of an umbrella it will flow along the umbrella and be directed outside of the umbrella. Hence anything that is below an umbrella will be kept dry.

What happens if you have a sanitary napkin designed like an umbrella?
Fluid will flow around the napkin and drip from its edges... gross...

What happens if you have an umbrella designed like a sanitary napkin?
No need for gym if you can carry one in the rain... it just get heavier.

They may share similar purpose in life but they do so in completely different ways... If only this was a diapers advertisement, I could phrase it in a funnier note.

Oh, don't search for "whisper rain advertisement" in youtube, it gives you something very unexpected.