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Shape__Shifter t1_j9stptj wrote

Google says hormones, they're highest in the morning..

Or just a result of sleep cycles with healthy nerves and blood flow

Or a change in nervous system during REM sleep..

There doesn't seem to be an agreed upon answer, more just something that happens

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JetKeel t1_j9t3i00 wrote

Question could be, why do guys get a boner when….?

Maybe, hormones. Maybe, sleepy. Maybe, awake. Maybe, excited. Maybe, sad. Maybe, fuck you, that’s why.

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