T410 conducting /releasing electricity from the bottom? :?:

[smtwtfs]

I've been using IBM/thinkpad for years and this T410 for around 2 years. I didn't not notice this until yesterday.

My BF and I were sitting together while I resting my laptop on my lap. He touched my face and said my skin has so much friction it almost like felt like it's vibrating while his hand moving around my my face. I touched his face and it felt the same way (rubbery, vibrates while moving, almost "sticky"..), but none of us felt that on our own skins. We then figured out that if I am in touch with the bottom of the laptop while it's charging, this happens.

Does anyone have the same experience? Is it safe (by safe I mean long-term wise. I am using my laptop almost 24/7 and wonder if there are any long term effects)

Thanks!