I would be very careful about this. Not knowing the sort of blokes you like to date, he might be into this sort of thing, being smacked by a woman and all. He might even end up sending you sly little emails afterwards asking you to use a whip next time with nipple clamps and chocolate sauce.
I think you should get the eight hole punch and drop it onto his lap ... smile sweetly and apologise for being sooooooooooooooooo clumsy. ( Never got a Gestetner machine when you need one , these days! ) Buy him a hot chocolate to make up for it made using ex-lax.
I have only ever punched one bloke (age 11 - I saw him kill a baby duck!)
He would not stop asking me out for the next 6 years!
Punching him was one of the best things I ever did
...but you don't want this bloke falling in love with you!