Nun joke reprise:

Novice nun gets pregnant after a year in the service - how can this be asks the mother superior - hasn't the priest been telling you about the evils of sin

Oh yes said the novice - he made me show my nether regions and called them the gates to heaven - then he lifted up his frock and showed me the key to open them

Well the little liar said the mother superior - he told me that was Gabriel's horn