Tone also matters a lot. And generally, profanity is used in a negative tone. Developers who are constantly negative are like poison and should be removed from a team as quickly as possible.
Profanity is used joyfully. Swearing is fun. Glorious, playful, creative.
See Roger's Profanisaurus for an example.
> tandoori whisper n. Silent, yet exquisitely rancid, burst of wind following an Indian meal.