Pro: It's pre-dating, without the pressure of wondering if you're date's profile is accurate.

Con: Singles may feel shy and not ask someone out for an official date.

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Con: People lie about their age, weight, height, income, and marital status. Pro: You can meet people outside of your geographic area and social circle with similar interests.

You'll meet more people, so you can learn what you're truly looking for in a date, mate, or relationship. Con: It's feels like a full-time job for many and you must be organized.

Fibonacci sequence has been a big factor in many patterns of things in nature.

One has found that the fractions u/v representing the screw-like arrangement of leaves quite often are members of the fibonacci sequence.

Even though he was born in Italy he was educated in North Africa where his father held a diplomatic post. He published a book called Liber abaci, in 1202, after his return to Italy.

This book was the first time the Fibonacci numbers had been discussed.On many plants, the number of petals is a Fibonacci number: buttercups have 5 petals; lilies and iris have 3 petals; some delphiniums have 8; corn marigolds have 13 petals; some asters have 21 whereas daisies can be found with 34, 55 or even 89 petals. The first problem Fibonacci had when using the Fibonacci numbers was trying to figure out was how fast rabbits could breed in ideal circumstances.Using the sequence he was ale to approximate the answer.Con: It can become addicting to some, who never meet offline or are looking for the next pretty face. Pro: Many sites provide matching tools and send you emails of suggested matches to make it easier for you to view potential dates.Con: Many singles limit their search criteria to height, zip code, or income and can miss the opportunity to meet a compatible match.Being able to grow and maintain your relationship offline is critical as you go through the different phases of a relationship.