Maybe it's a combo of the woman and the way she's holding that bottle.
I've done shore leave in Dubai and kuwait where even storebought movies have blurred bubbles over the racy bits and forget about anything remotely stimulating ( for my jaded tastes) on the tele.
After a while I got to the point where the sight of bare midriff on punjab Mtv was cause for ...er...celebration. I was forced to re-ignite my imagination.
Being as the guys above have probably never had anything but their imagination the ads must seem extremely provocotive which can be a real problem when you only wear light cotton whatevers and no undie grundies.