Girls can ask a guys height, but guys can't ask a girls weight?

RandomStudent
Especially on Tinder or a dating site, girls always wanna know a guys height and pressure guys to put height in their bio or whatever. So why is it crossing the line to ask how much a girl weighs? At least weight is something that can be altered, unlike height.
Girls can ask a guys height, but guys can't ask a girls weight?
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