is there only a certain point you can go up when your doing anal, because ive seen some videos online of people putting the entire double ended dildo up their ass which has to be at least 16 inches long and i cant even get it up passed 6 inches. Too, most people need to take a long time to introduce anal entry pretty gradually, taking baby steps with given sessions if youre going to do this, i suggest stopping the depth of entry before a point where you experience pain (or if you get to pain already, then just have your partner pull back a little and stick to a level that is comfortable and enjoyable for you) and working with that. The authors measured the length of the surgical anal canal (anorectal ring to anal verge) in 108 men and 103 women the age ranged from 18 to 90 years (average 59 years). Most people cant do the splits without a lot of stretching and training first turns out its the same for stretching your anus. Now, knowing the average is all well and good, but unless your penis is 5. 16 inches exactly, you might be in the dark about how yours fits into the bigger picture when it comes to penis length. According to one study, the average depth of a vagina is about 3. Other sources suggest that the average range of size may be about 3 to 7 inches. What would be the biggest pee pee that you can fit up in there length wise and width wise wthout doing severe damage.