I always have knee pain so where can I buy a new knee? Also does it come with a new ankle because I also experience a lot of pain in my ankle (◐‿◑)

Which of these is a sexual stereotype? a) on average, males are taller than females. b) people over the age of 60 are not interested in sex. c) male hormone levels differ from those of females. d) there are more male representatives than female representatives in congress.