The Priest's collar

  

A priest was invited to attend a house party.
Naturally, he was properly dressed and wearing his 'Priest's Collar'.

A little boy kept staring at him the entire evening.

Finally, the priest asked the little boy what he was staring at.

The little boy pointed to the priest's neck.

When the priest finally realized what the boy was pointing at, he asked the boy, "Do you know why I am wearing that?"

The boy nodded his head yes, and replied, "It kills fleas and ticks for up to three months."