Because the people who make the programming for the sims themselves (not the objects etc) don't like EA game but mostly they really dislike the players and they have never played the game seriously in their lives. If they can find something (more) stupid and annoying they will insert it into the game faster than you can say 'why?'. What's more they will make sure that it will repeat very few seconds, like the the little sniff food animations they repeat very few seconds. The skeleton (don't even get me started on this one) and its head turning and rib playing repeat very few seconds...rinse and repeat until insane. Remember this is a company who sold dirt and dust to players who were old enough to know better . They also have hardly ever been outside or have moved out of their parents basement which may explain why they confuse household hygiene with personal hygiene
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