If you can convince a female in less than 5 minutes then she is your mom.
If you can convince a female in 15 minutes then she is your sister.
If you can convince a female in 30 minutes then she is your daughter.
If you can convince a female in 1 hour then she is your girl friend.
If you can convince a female in 3 hour then she is your lover.
And ultimately....

If you can't or don't even get a chance to convince a female then she is your wife...!!