I get that treatment, and it really pisses me off.
I actually get told not to lift my own shopping, even piffly 12kg loads. Seriously. Then if I explain that I regularly bench several times that, I get told a delicate little woman like me shouldn't be lifting weights.
I think next time I'm just going to deadlift the annoying busybody up and drop them on their heads. No one would behave like that if I were a male, no matter how small, for fear of hurting my self esteem.
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'You're so cold, but you feel alive
Lay your hands on me, one last time' (Breaking Benjamin)