Top Left Corner:
Doesn't matter
Be examined

Other choice leads to a different set of cgs - top 2nd picture

Top row 3rd pic:
Yes, don't stop

4th row 3rd pic:
Doesn't matter
Let me guess: underwear?
Both choices

These pictures will also lead to a bonus picture for Rebecca's experimental end

2nd row 2nd pic:
Doesn't matter
Save here
Lie to him
Say nothing

4th row 4th pic, missing 2:
Load your save
Invite Greg
Just trust me

Prove it
Just ignore it

3rd row 3rd pic:
Go on the don't lie path
Choices don't matter for a while
Save again
Look for Rebecca

Bottom row 3rd pic:
Load the 2nd save
Fine lets do something
I'm easy to please