Where do you look and how long do you give them eye contact when you speak with the following people:

Female that you want to fuck.

Female that you do not want to fuck (friend, acquaintance, etc.)

Male in power (professor, boss)

Male friends, acquaintance and males that you just met.

I'm not sure where to look when i speak to a woman that I'm not attracted with. Also, when I meet a new guy and give him eye contact, they often look away. I believe eye contact is really good for escalating, I'll usually look at the area between their eyes and then give them hard eye contact when I start flirting. What are some ways that you use eye contact to escalate?