When a woman touches a man in passing is it a strong sign of interest?

Anonymous
Recently at work a bunch of women will rub my shoulder or touch my back in passing, is this a strong sign that they're flirting-with/interested-in me or am I reading too much into this? Most of them are older and some are my moms age which is awkward but one of them is a milf.
They're into you
Vote A
They're being friendly
Vote B
Could go either way
Vote C
Dont know
Vote D
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GirlGuy
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When a woman touches a man in passing is it a strong sign of interest?
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