I'd say more often than not what women designate as signs are quite cryptic, unless you perhaps grew up with sisters.

And even then, a lot of men choose not to act on these things. A woman could be making eye contact with me and tying her hair up thinking she's being sexy, and probably most women could just be looking at me while doing something they consider mundane.

Signs are inconsistent and vary person to person. I agree Reddit likes to make out like it's impossible, but you're probably also missing how many of us see these signs but ignore them because we don't want to lose our job or get shamed for making the wrong move.

That's why like always mentioned: straight forward is best

"I want to be your FWB"

No one is gonna be like "awww geeeeez idk what she means, better not get #metoo'd and say no"