Doc Johnson GoodHead Slick Head Glide Lubricant 4oz in Watermelon. Make all sexual activities smoother with this delicious ultra-slick lubricant. This water-based glide reduces friction and is completely body-safe and vegan. Unisex. Slather on this deliciously fruity glide and get ready to slip and slide into a state of pure bliss. Formulated from vegan-friendly ingredients for ultimate body safety, GoodHead Slick Head Glide lets things get wet and wild without ever drying tacky. Water-based and latex-safe, this watermelon-flavored lubricant makes every sensual activity smoother and tastier.