A new survey of 1,000 Americans confirms what you always suspected: A good many of those incoming Android, iPhone and BlackBerry calls and texts are originating from bathrooms.

Marketing agency 11mark's "IT in the Toilet" report reveals that three-quarters of those surveyed say they use their phones in the bathroom, making calls, texting, emailing and surfing the Web. 11mark says this "bathroom benchmark" shows how connected we have become.

Android users (87%) have used their phones in the bathroom versus 84% of BlackBerry users and 77% of iPhone users. (Product vendors have taken note of such usage and at this past month's Consumer Electronics Show displayed offerings that safeguard iPhones and other devices from taking dunks.)

Men and women are about as equally likely to use their mobile phones in the bathroom, though men were shown to conduct work on their phone more frequently than women do.

Gen Y respondents proved to be the biggest bathroom phone users (91%), followed by 80% of Gen X-ers and 65% of baby boomers.

And now, for the obligatory bathroom humor:

"The writing is on the stall," quips Nicole Burdette, a principal at 11mark. "This study confirms what we all know -- that the last private place is no longer private. And, that the 'mobile-everywhere' phenomenon is flushing out a host of new opportunities for savvy communicators."