Growing up in a Christian family, I learned to give a tithe, as the Bible teaches. So with my first working income I was glad to tithe to the church.
God loves a cheerful giver.
2 Corinthians 9:6-7English Standard Version (ESV)
The Cheerful Giver
6 The point is this: whoever sows sparingly will also reap sparingly, and whoever sows bountifully[a] will also reap bountifully. 7 Each one must give as he has decided in his heart, not reluctantly or under compulsion, for God loves a cheerful giver.