Beyond Bed, Bathtubs?

Possible explanations for why those Cialis commercials feature a couple lounging outdoors in matching antique bathtubs:

They're hoping to make "Your antique bathtub or mine?" the hot new aging baby-boomer come-on/catchphrase.

Because he'd already bought one, the art director got a second antique bathtub for free.

The advertising industry ran out of ideas in 1987 so now they're just playing with our heads.

It's probably a euphemism for something. Or possibly a metaphor.

Whatever it means, it's still better than the ads with those guys sitting around singing Viva Viagra.