When the Time is Right, You'll Be Frozen

Can someone please explain to me the significance of the bathtubs in the Cialis commercial for erectile dysfunction?   

If you haven’t seen the commercial, I’ll paint a picture:  two bathtubs, side by side, outside, usually overhanging a cliff, and all you can see is the back of two people’s heads; one in each tub. 

Was there a study done that claims that if a man sits in a tub long enough his erectile dysfunction will go away?  Is that the connection?  What if the water is cold?  Didn't we learn anything from Seinfeld?  Or are they pointing out that a side effect of the drug is that you will develop an intense need to invest in mountain living and outdoor plumbing? 

Then they interview couples to discuss “when the time is right.”  And although they don't come right out and say it, they mean when the time is right to have sex.  If the time is right, wouldn't it make more sense if they were both in the same tub?  That's the commercial I'd like to see.