Scientific permission to do what comes naturally:

we swear not merely as a reaction to pain, but because it can actually reduce our sense of pain.The new finding comes from research that tested the hypothesis with a bunch (67) of college students and some ice cold water. Students were given a choice when they plunged their warm hands into the freezing water — chant a neutral word, or repeat a swear word instead.

Those students who chose to swear reported less subjective pain than the neutral word chanters, and could endure the icy cold water with their hands for about 40 seconds longer on average.