SOUNDS THAT FEEL GOOD: ASMR
Autonomous sensory meridian response (ASMR) is a phenomenon characterized as a distinct, pleasurable tingling sensation in the head, scalp, back, or peripheral regions of the body in response to visual, auditory, tactile, olfactory, or cognitive stimuli.
In other words it’s a brain orgasm from certain things. It makes people feel good. Some examples are ear-cleaning and whispering.
Not everyone experiences it and it’s a controversial phenomena. But listen to this audio of crinkling plastic. Did it give you a brain tingle?
You can look on YouTube for more examples of ASMR, also here’s a reddit thread where you can find more audio
Also here’s a wiki article where you can find more information on ASMR