A Pastor goes to the dentist for a set of false teeth.

The first Sunday after he gets his new teeth, he talks for only eight minutes. The second Sunday, he preaches for only ten minutes. The following Sunday, however, he preaches for two and a half hours!
The congregation are besides themselves and eventually had to mob him and force him from the pulpit.
They asked him what had caused him to go on for so long, particular following the previous two brief sermons.
The Pastor explains that on the first Sunday his new teeth had rubbed badly on his gums, making them very sore and he could only speak for five minutes. Whilst things were a little better on the second Sunday, he was still restricted to speaking for only ten minutes.

However, on that very morning of the third Sunday he had left the vicarage in a bit of a rush and had put his wife's false teeth in by mistake................................. the result of which was that once he had started his sermon he just could not shut up!!!!!