When I Grow Up

This nun at the Sacred Heart of St Brigid's Primary School is asking all the kids in her class what they are going to be when they grow up.
The first one she comes to is little Patrick.
'I'm going to be a priest, sister! says little Patrick - the crawler.
'God bless you, little Patrick,' says the nun, passing on to the desk where little Concepta sits.
'I'm going to be a nun and a teacher like you,' says little Concepta -the brat.
'God bless you, little Concepta,' says the nun, passing on to the seat on which is placed the behind of little Derval, who comes from a family of fourteen living in a caravan which was abandoned by the gypsies.
'I'm going to be a prostitute, says little Derval.
'Whaaaat?' squeals the nun, clutching her rosary beads for support and turning forty shades of puce.
'I said I'm going to be a prostitute, says little Derval.
Thanks be to God.' says the nun, 'I thought you said a Protestant!