For example, on https://youtu.be/CW87dyYIimE?t=340 (and related work on motherboard), it says the managment chip uses two MOSFETs as a switch (as overheat protection, emergency poweroff on 10-second powerbutton press etc).
While the story makes sense and I can understand how it would work, I'm wondering why such MOSFETs need to come in pair? To my (begginers) view, it looks like one MOSFET should be enough to act as switch for mentioned purposes. So why are there two MOSFET connected in series? What else am I missing?