a little of topic, I worked for several years in a University dept that was part of a Pharmacy dept, so we had access to the pharmaceutical prep equipment for pills powders and creams. For a wedding present for couple of colleagues, the research group gave the bride and groom a special 7 pound (3.5kg) jar of KY jelly. Which caused much hilarity when it was unwrapped at the reception...
It wasnt until the bride and groom returned to work that we discovered that a colleague had used the departments prep equipment and blended in a liberal dose of local anaesthetic.....
They did not discover this until it was distributed around the vital parts of BOTH partys; it took 12 hours for the effect to wear off...
They(and we) got revenge a few months later, but thats another story..