Front to back till the “substance” is gone. Back to front after for any residual “residue”.
I’m using completely the wrong words but I hope the meaning gets across.
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Anonymous#91w
I actually just use a vacuum. Like the attachment you use to get in small areas
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Anonymous#81w
Genius. I must try that
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Anonymous#101w
Also never switch to back to front prematurely. Then you’re just moving it back into your asshole