12 Pranks To Play On An Angry Boyfriend
10. To Dye For
His Anger Level: 9/10
What To Do: Use a small drop of temporary hair dye (bright colours work for best results) and put it in a shampoo bottle that's almost empty. Wait for him to take a shower and later notice that his hair is a different colour.
Verdict: Don't use something as drastic as black on your blonde boyfriend, he might just completely lose his sh*t.
Also, do it over a weekend so his boss doesn't fire him for looking like Vanity Smurf. He might like the new look, but he won't tell you until his temper's cooled.