If you want to 'get laid', you shouldn't be going to church to pick up!!! What were you expecting?? These girls have their beliefs and want to wait (as most christians do), there is nothing wrong with that. They probably get wanna be porn stars coming to church to get 'hot chicks' all the time, thinking that all they have to do is walk through the door and girls will just sacrifice their virginity then and there.
There are plenty of chicks out there that would be all too happy to meet your needs, go get one of them.

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You never know............................. until you ask!