I learned wrist mount by first going around the non-throw-hand index finger (like a trapeze) before going around the throw-hand wrist, and around the NTH index again before dropping it into the “bucket”.
Used Miguel Correa’s very good tutorial for Spirit Bomb to learn that trick, and he goes first around the thumb, the way you would if you were throwing a Houdini mount, before going around the index on the second pre-bucket pass.
Do you always do it a particular way? Thumb or index?
If you use both, do you have a particular reason why? Just on a whim? Since wrist mount completes by dropping the NTH, I can’t think of a practical reason to use both other than for the giggle of it (ever since seeing that video, I’ve been doing both for the giggles but I still consider myself an index-finger wrist mounter).