Some people may not realize that cervical penetration is impossible. You can think of the cervix as a closed door between the uterus and the vagina. It is the reason a tampon can't get lost in the vagina. The tampon has nowhere to go. The cervix only opens up during labor.
Had to do it, too much misinformation in the stories, someone is going to end up hurt or hitting someone because they think this is an educational site.
Michael Loucks has it right in his stories. Sex education in schools is lacking. (He says American schools, but I have seen enough from outside the USA authors to see the bigger picture)
(Title and first paragraph are from We MD)