Wood can be a body-friendly, not to mention extremely stylish, alternative to other types of material.  It’s smooth and luxurious to the touch, and warms up during use.  The most important safety issue when it comes to wood is that it’s sealed properly with a non-toxic sealant that won’t break down or dissolve over time, and which creates a smooth, non-splintery finish over the toy.  Wooden toys which use a proper, phthalate-free sealant are non-porous, waterproof, hypoallergenic, and completely non-toxic.