[sbierwagen]

No. All human endeavour is social signalling.

https://en.wikipedia.org/wiki/Signalling_theory

[someguyorother]

I'm naturally suspicious of this kind of reductionism, because it so easily shades into unfalsifiability.

"Everything you do is either because of X, or you believe it's for some other reason but your subconscious does it because of X anyway."