Ross and Rachel are considering hiring a male nanny, and Ross feels that men should not be nannies. Rachel disagrees and convinces Ross to hire the nanny for his qualifications, not his gender.
Violet is not considered for a promotion despite her extensive years of experience. Her manager is very forthright in his reasoning - he needs a man to take the role.
Greg meets Pam's family and tells them that he is a nurse. They laugh and think he is joking. He then explains that he had the option to go to medical school but chose to be a nurse instead. This clip illustrates gender discrimination in the nursing profession. Women as usually depicted as nurses, not men.