[A. Pole]

The girl's presence at the altar probably means there is one less boy there. [...] As it stands at many churches today, all of the altar servers are girls and there are no boys.

There is one important psychological characteristic of boys - they instinctively do not want to appear or be "girly". So girls can push boys out, at least those boys who should be priests. :)

[Senator Pardek]

Where's Askel5 when ya need her?