Lovehoney Large Classic Silicone Butt Plug 5.5 Inch. Not only was she way up in there, but her arms were straight up and. As some of you know, most stores don't stock the monster toys that we prefer! Inflatable dildos blow up to girths that would be impossible to insert through the anus or vagina. What harm can occur when using an 18-inch dildo up your sexual pleasure?