For the very pious, life is a mess of exposed skin and long limbs, just waiting to tempt you into sin. You dare not wander on to the streets for fear of seeing an immodestly dressed woman and getting a brain-full of impure thoughts.
Orthodox Jewish men shun any contact with the opposite sex but for most, they live in a society where many people don't subscribe to the same idea , leaving them open to catching an exposed elbow or flash of cleavage at any moment.
The latest idea to combat a life of sin is a practical one: if you can't stop immodest women coming into your line of sight then perhaps you can stop the vision itself?
For the ultra-Orthodox Jewish man there is a technical innovation at hand to help . Glasses that blur their vision is the new trend among the super-devout.
In Israel, Orthodox Jews have been pushing for measures to segregate the sexes for many years, famously succeeding in dividing the buses of Jerusalem into 'male' and 'female' sections .
Other cities around the Middle East have taken similar precautions. The subway of Cairo, for example, sets out 'women only' trains . But the blurry glasses are proving a particular hit in the American Jewish community, with "modesty patrols" hawking the spectacles out around the most religious areas for a bargain price of $6 .
Apparently unable to stop their wandering eyes, the pious are keeping to the tenet: "out of sight, out of mind".
Should women and men be segregated? Is it the responsibility of the religious man to keep his gaze away from unmarried women? Tell us what you think below.