How do I do it? Where from?
I've eyed up the offerings in Sainsbury's but can't bring myself to buy them unless they are over 18 only and have to be 'approved' at the self-checkout.' 
I'm scared of buying on line too as you never know what the packaging is going to be like and the men at the post sorting office know me and where I work (I have an unusual name that's the same as someone famous). I've had a couple of mortifying incidents recently with things being deliverd to work (underwear) and (toys) - both had identifiable 'senders' details on the packaging. One was something like 'wankmonkey' or something and another came emblazoned with erotic shots. 
Any suggestions? I swear I'm not a prude but I like to be discreet about things. 