The garter is not necessarily a functional one that actually holds up a stocking. In fact, it’s usually no more “functional” than the buttonhole on a man’s lapel.
There’s the old rhyme,
“Something old, something new,
something borrowed,
something blue,
and a lucky sixpence in her shoe.”
My mom tells me she wore a blue garter at her wedding (1964), and I caught one at a reception back in the nineties.
I have not seen the remove-the-garter-with-the-teeth thing (praise God), but I have seen the toss, with the garter-catcher putting the garter on the bouquet catcher (with varying degrees of immodesty). I also have not seen (in person) the smooshing of cake in each other’s face.
If you want to do the “traditions” above, I suggest:
– spinsters (and widders

) gather, bride throws bouquet
– “eligible” menfolk gather, bride discreetly removes garter, gives to groom, he fires it into the crowd
– garter catcher asks bouquet catcher for the honour of the next dance. And that’s that.
Oh, and as for the cake thing:
– bride and groom feed each other a small piece (an inch each way, at most) of cake in a gentle and loving (and RESPECTFUL) fashion; I always believed that this was symbolic of the bride and groom caring for and “nourishing” each other (but then again, I can be on the naive side)
I have also thought that the father of the bride and the mother of the groom having a “last dance” with their respective children was a sweet tradition…but then again, I’m a bit of a sap