Should never touch thermal paste with your bare skin. As all thermal pastes contain metal oxides which can seep into your body and poison you.
Especially in the Computer Industry where we are dealing with this stuff on a daily basis.
I am going to call you on this... I want proof. Looking up thermal compound and other related terms turned up zilch for any health or toxicological effects. Looking up the common compound used in thermal pastes produced very little, and you'd need to inhale the oxide in order to do anything in the one mention I found. Another one states something about inhaled nano particles.
What about the emissions when you walk outside your door, or even inside your house. How about the vapors given off in your car from the vinyl and other items, I read they cause that film on your windshield that is so hard to completely clean. What about new homes where you are supposed to live with your windows open for so long due to out gassing, much the same as your car. How about the microwave plastic scare. What about people being afraid of irradiating food as a safety measure, yet these idiots are afraid of it being radioactive when there isn't a chance in hell. Perhaps I should ask how many people smoke, live with smokers, hang out with smokers... or perhaps do onsite work where someone is smoking? THAT HAS BEEN PROVEN TO CAUSE HEALTH EFFECTS! What about the lead in solder on those old boards you handle, do you religiously wash your hands afterward? What about breathing, oxygen causes free radicals that cause DNA damage which could lead to cancer. Are you overweight? Diabetes, heart issues, etc. Do you exercise regularly? Do you eat red meat? I hear that's not the best for you. What about the stuff in the water you drink, it's not pure H2O you know, plus there is a bit about fluoride in the water that it's not necessarily good for you as some people claim. Do you have any florescent lights where you work or live? Did you know it's damn near impossible to clean all the mercury up if you break one? You need to throw out carpet, clothes, etc that comes in contact with anything near that breakage. You can vacuum it up, you can't get it all up, it may linger in any air conditioning/heating system you have for years and years.
Yet you have an issue with thermal paste on my finger for 5 seconds that I wash off. Perhaps if I lathered up with it and left it on for life... but then maybe it would block all the UV rays outside and prevent skin cancer, you do use sun block every time you step outside right?
Don't post scare mongering without some kind of proof, especially when there are things out there that will hurt you much more, and more surely.