Perhaps worth repeating that, although I spent forty years in aviation, I'm still not too cool to read the safety briefing card and keep the seatbelt fastened whether the FSB light is on or not.
Another thought is that, even if you are strapped in, a 90kg unsecured passenger landing on you could spoil your trip. OTOH a 60kg unsecured stewardess may be more agreeable
(am I allowed to say that?)