1000 pounds +
puma
The heaviest (hevest?) naturally occurring element is Uranium (238 a.m.u.) but the heaviest known element is atom number 114, 117 or 118, the exact mass being unknown but over 250.
i am 90% sure it is a blue whale. yeah a blue whale
Honestly, yes they should, but many do not. Some people only think you need to worry about wearing a cup, but boys should keep their genitals supported anytime they run or workout, to prevent twisting or soreness. At a minimum a guy should wear something supportive like compression shorts, or tight briefs, but jocks really do the best while still letting things breathe. There's youth and teen sizes out there too, so even if you're just starting to grow it's important to start wearing a jockstrap.