The drawer is much larger on the inside than it is on the outside.
Many of the things in this drawer Marlo can identify. The rope is pretty obvious, as are the knives. He can probably figure out the use of the whips, canes, and paddles. A few of the dildos are shaped like very realistic penises, which can provide some enlightenment about the ones that look like scrapped alien designs or abstract art or are simply far too large to fit inside a normal human body. He's probably even used lube.
But many of them have no obvious use at all: egg-looking things with flared bases, in various sizes; something that looks like a bright purple rubber cactus; a set of thin silver rods; several tubes with inner holes the size of a banana.
Some of the things seem to have an obvious use, and that use is 'torture.'