Don't bet on it. No such study was published in the
New England Journal of Medicine (
check for yourself).
A search of the thousands of international medical journal articles contained in the
Medline database turned up zero items on this topic and zero items authored by "Dr. Karen Weatherby," who presumably does not even exist.
If the story seems to smack of tabloid journalism, it's because that's precisely what it is. It began circulating via email in March or April 2000, not long after a similar article appeared in the consistently misinformative
Weekly World News (nor is this the first time we've run into laughable rumors traceable to that source).
It goes without saying — I hope — that it's unwise to take medical advice from supermarket tabloids, still less from forwarded emails. Males who wish to increase their lifespans should consider practicing common sense as an alternative — it's more likely to achieve the desired result than any amount of breast ogling.
Admittedly, I don't have a medical study to back that up. Volunteers?