This class is just sowing seeds that may or may not take root on fertile soil. The couple that enters marriage planning to contracept may have 7 children before their 17th anniversary.
Also, consider your audience. NFP for the purposes of avoiding children requires abstinence–that’s not a great selling point to engaged couples. They don’t want to abstain on their honeymoon.
Don’t preach about abstinance to the soon to be married; teach them how to make babies–through making love. That might hold their interest.
Okay, I’ll write it again, as I often write it on this forum: what really got through to me was the church teaching about the
blessing of children. NFP can be used for valid reasons, but these couples should be informed that the purpose of marriage is to create children. MATRImony- the sacrament of motherhood. They are entering marriage to create a family–starting as husband and wife, and likely children will follow. Children are the supreme gift of marriage. Encourage them to place “children” on their bridal registry list for God.
While you encounter Catholic couples who wish to contracept, those very same people also likely wish to have children eventually. Sadly, some people who contracept find out later that they are infertile–remind them of that! NFP can also help with infertility problems. Also mention to them about some couples who have “honeymoon babies” that sometimes go on trying to have more children but never do. The decision to post-pone children might mean they don’t have any children
ever.
Teach them the truth that their hearts already know: that marriage creates family and life springs forth from love.