Pawfasting is the furry version of the Neopagan wedding ritual of handfasting, in which a couple's clasped hands are ceremonially bound together by a cord or ribbon, as a form of relational commitment.
The furry version does not stray much but in name from the principle of its mundane counterpart, whereas, in this case, it's two furs, regardless of sexual and/or romantic orientation, partaking in it.
The betrothal can either be performed in traditional Wiccan style, or by any other means chosen by the parties involved. Pawfastings commonly take place at furry conventions, in a general public area. Anthrocon got so many requests for them that it now declines to host them onsite.