A laptop is made of two words "lap" and "top", which means you put it on your lap. But I wouldn't do that if I were you. Why?RADIATION!!!
Your laptop has radiative energy around it. So don't put it on your lap.This is because the radiation will go directly to your reproductive system are and kill some cells. This can cause impotency and infertility for both men and women.
Also, when you put it on your lap, most of its ventilation gets blocked, which makes it hotter and hotter ( heat wise ), which will eventually change the shape of the sperm in the semen.
In fact don't put it anywhere near your body. Put it on a table. And if you start to get a headache then it is advisable for you to stop using it for a while. Even when it is on table, you can get in contact with the radiative energy if you are exposed to it for a long time.
And this information goes in the same direction on why you shouldn't put your mobile phones near your genitalia region or your head. If you get a call, then put it on loudspeaker. If your phone doesn't have loudspeaker that don't put it against your head for long.
That is all.
