Mmmmmmmm

Okay, so I just finished a mandatory online learning course for work entitled, "Preventing Workplace Harassment" and I had to share.

Which of the following 3 situations demonstrates harassment? Here's the scenario: it's an office party, and Dan, the boss, is going around and greeting his employees.
Situation 1: Dan walks over to Bill, claps him on the shoulder and shakes his hand. "Hi Bill, thanks for coming!" "Thanks Dan, it's great to be here!"

Situation 2: Dan walks over to Joan, claps her on the shoulder and shakes her hand. "Hi Joan, glad you could make it!" "Good to see you, Dan. This is a great party!"

Situation 3: Dan walks over to Sally, arms wide and says, "Hi Sally! Let's have a hug." At which point he gives her a big hug accompanied with a nice, loud, "Mmmmmmmmmmmmmmmmm."