I really thought that the end of this retractable sharpie would be too thick to enter my cervix all the way, and so it would nestle just inside the opening and I could click the marker tip in and out against my cervical os. I was wrong! No matter how firmly I fucked my cervix with the end of the pen, it just swallowed it without any resistance, and never clicked it. There's an extreme close-up endoscope view in this one, so you'll be able to see all the details as it slides in, including the slippery cervical mucus- I didn't need any lube! After a bit, though, I needed to put the endoscope down so that I would have a hand free for my vibrator. I had several good orgasms while penetrating my cervix, then licked my slippery juices off of the marker. My womb is tasty!