There are some interesting facts, statistics and advice offered by this Time Magazine article: “How to Be a Good Kisser.” Here are two examples:

The first kiss is a necessary risk in every budding sexual relationship; a recent psychology study found that 59 percent of men and 66 percent of women reported breaking things off with a prospective partner because of it. People remember their first kiss more vividly than the first time they had sex.

One more:

Men who kiss their wives before work live 5 years longer, make 20-30% more money and are far less likely to get in a car accident.

For those of you who are trying to identify the right person to marry, there is a mathematical solution to this problem proposed by Martin Gardner.