It's not harmful in any physical way.
And as far as I know it's just the first step into becoming a Christian and a necessary ritual to be able to "use" the services of that religion like for example getting married in a church and all that.
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
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