[gregsadetsky]

One of the referenced papers [0] concerning addiction to UV light (in rodents) is fascinating as well..!

“UV light is an established carcinogen, yet evidence suggests that UV-seeking behavior has addictive features”

“Opioid blockade also elicits withdrawal signs after chronic UV exposure”

[0] https://pubmed.ncbi.nlm.nih.gov/24949966/

[lapsis_beeftech]

What might be going on here is that the UV induces radiation damage, which leads to endorphin release as part of the body's response to injury and pain. I have experienced this effect myself at times after getting a sunburn; the endorphins blocked the pain entirely and it was moderately euphoric. I know how dangerous sunburns are but if I was a rodent I would likely seek ways to repeat the experience.