They are told that they before they can enter, they must present something Christmas-sy in order to get in.

The first man searches his pocket, and finds some pine needles from the family's Christmas tree. He is let in.

The second man presents a bow and some ribbon, from presents that were opened earlier in that night. So, he is also allowed in.

The third man searches his pockets and pulls out a pair of lace pant!es.

Confused at this last gesture, St. Peter asks, "And just how do these represent Christmas?"