Ok basically i was watching the video on youtube and it was about unwrapping this package my friend got (no im not saying what the package was) and well I'm not sure how to describe it really its hard to explain but at the back of my head I sort of get this internal massage but its a really nice feeling and it sort of make me go numb so if im typing I lose feeling in my fingers its weird but its REALLY soothing and calming I sorta dont want thew moment to end HELP!

Is it normal? and If its a medical thing or something please tell me what it is thanks!