Just Smile and Danish:
Its not even worth discussing whether or not to “tell” girls who want to date at 18-19 that they shouldn’t, simply because they and their parents will not listen. However, if boys 22-25 are encouraged to date and marry girls their own age than inevitably fewer 18-19 yr old girls will get married.
Clearly there will always be 18-19 yr old girls dating. BUT if we are able to have fewer of them get married at that age then there will be far fewer girls turning 30 and still be single. Sounds like a positive result to me.
Similarly with the boys. At this point the message is to encourage them whenever they start to consider girls their own age. In the big picture, movement will have to be made on both ends to close the gap simply because at the end of the day there will always be far more 19 yr old girls than 23 yr old boys. This is the situation, no two ways about it.