I think lovehoney stuff does usually arrive discreetly... not that I'd know or anything...
There's also a nice warning at the bottom of that page about what would happen if you sent them for revenge lol.
"Practical Jokers! We log the time, date and IP address of all computers used to request free condoms. If you harrass someone by sending them something they don't want and they make a complaint to the police, we can provide them with those details and they can find you through your ISP. It's a fair cop, guv!" - so I say if you do that, use someone else's computer! x