As well as having higher gravity, what if Earth was also unusually cold by habitable world standards. Say it's relatively unusual in this era for a habitable world to be in an ice age, even in an interglacial, or to be so far out from the sun. And Earth has what is considered to be extreme seasonal variations.
As a result, most other races tend not to wear too many clothes and think it's odd for Terrans to do so - right until they land someplace just short of the arctic circle, confidently expecting the weather to be a 'cool' 70 or 80 degrees Farenheit. And what's this 'snow' stuff?
Terrans visiting other worlds have a slightly deserved reputation for sweating a lot.
Plus, Terran's probably have bases on Mars. Have all basic training happen there - earns an instant reputation among other species for being horrifically demanding just for the location.
D for Drakensis
You're only young once, but immaturity is forever.
As a result, most other races tend not to wear too many clothes and think it's odd for Terrans to do so - right until they land someplace just short of the arctic circle, confidently expecting the weather to be a 'cool' 70 or 80 degrees Farenheit. And what's this 'snow' stuff?
Terrans visiting other worlds have a slightly deserved reputation for sweating a lot.
Plus, Terran's probably have bases on Mars. Have all basic training happen there - earns an instant reputation among other species for being horrifically demanding just for the location.
D for Drakensis
You're only young once, but immaturity is forever.