I recall the idea that just like a jelly mould that has a dent all of the jellies will also be dented. Therefore just as Adam was imperfect we to would have the imperfection.
An experiment to test this hypothesis.
You will need:
A hacksaw
A working reproductive system
A willing fertile member of the opposite sex.
Bandages
Candles, lubricant, romantic music, alcohol as required
Using the hacksaw, saw your leg off below the knee. Bandage until the bleeding stops.
Take the willing fertile member of the opposite sex and perform the act of love. Repeat until one of you is pregnant.
Wait approximately nine months. When a baby is born, examine it to see if it is missing one of its lower legs. (If it is, then the jelly mould theory may be accurate. To confirm, saw off the other leg and repeat the experiment.) If not, then it's clearly a load of old phooey.