There are lots of little traditions like this, from decorating the Christmas tree to kissing under the mistletoe to exchanging gifts that are a lot of fun.

有很多类似不起眼的传统，从装饰圣诞树到亲吻槲寄生然后交换礼物，这一切都是如此的有趣。

youdao

The tradition of kissing under mistletoe leaves comes from several different origins, one of which is an old Viking myth.

在槲寄生叶子下亲吻的传统有很多不同的起因，最早起源于一个古老的北欧海盗神话。

youdao

Lee's affections for Lucy first came to light in series two, but despite arranging dates and kissing under the mistletoe, the pair have never quite managed to get it together.

BBC: Lee Mack reveals Not Going Out has two different endings