What's This Weird Stamp?

To celebrate the union of one silly goose and one silly billy (goat) respectively, Carson and Michelle collaborated to create an emblem they felt embodied the joyful, playful, loving and (most importantly) silly nature of their relationship.
After initial sketches, Michelle hand-carved the emblem into a stamp, which Carson perfectly pressed onto the envelopes for each save the date.
The bride and groom expect to keep using this emblem. A lot.