For a bit of Christmas fun with your partner, consider holiday-themed boxers. This type of novelty underwear is meant to be worn for a laugh, maybe once or twice. So odds are you will not base your purchase on weather the underwear is made of high quality fabric, weather it will last, or even how comfortable it is. These come in prints and patterns that feature Santa Claus, reindeer, candy canes, presents, and many more.
Here’s a good example – I like these:
Christmas underwear for men pictured: Fun Boxers Santa’s Shorts Christmas Boxer Shorts for Men