Baptism Day

It's Baptism Day for me later @ church during service. There will be many people getting baptise today (i think about 40 people)
This is undoubtedly an important occasion for Christans as it marks the sign of being child of GOD.

Nobody will be coming to witness or support except maybe my room mate during the weekend Network Encounter where he was being baptised last month.
Yesterday, one of my student's parent asked me an interesting question upon hearing i am baptise today. It also signify that i have to give 10% of the monthly salary to the church. I was dumbfounded ...................... No other religion declares that right?