Examples:

• Do you think we can draw the line at 600 photographs?
• I draw the line at negotiating with the Pope.
• A little experiment, to see where you draw the line.
• Of course, a gentleman knows where to draw the line.
• There's gotta be a point where you draw the line.
• We should draw the line between public and private affairs.
• You know, you got to draw the line somewhere.
• I suppose you could draw the line with these dolls.
• Well, it's good to know where we draw the line.
• Well, you got to draw the line somewhere.