Is it really necessary to wait for everyone to have food or one should have food whenever one feels hungry?

if ure at home with ur own family... u xan eats as and when u like. but if hubs around for dinner, its always nice to eat together.. or if ure out with family and mil or relative... its okay to wait when all food is serve.. unless ure pregnant and or or really hungry. go ahead and dig in. it doesnt matter