How easily does glass slide in vaginally compared to other materials?

Contributor: edeneve edeneve
Related to: 
how easily does glass with some girth, say 4 3/4", insert vaginally compared w/ other materials?
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Contributor: GingerAnn GingerAnn
Relevant topic analysis on Glass dildo:

glass for a beginner?
I'm looking to get opinions on glass dildos. I like textures but I don't want something too thick. Any suggestions for me to try for my first one?

First glass toy?
Here's one for all you Glass-Lovers like myself. What was your first glass dildo/vibrator. How did you like it, and did you immediately warm up to it.

Glass toys: smoothed or nubbed?
Do you prefer smooth or a toy with nubs?

What's the worst glass toy you ever purchased?
I am trying to build my glass toy collection but there are so many and I would like to hear which ones to avoid. I have a hard time reading reviews...

glass lube?
is there any lube that goes better with glass
Contributor: Kindred Kindred
Originally posted by edeneve
how easily does glass with some girth, say 4 3/4", insert vaginally compared w/ other materials?
It depends on what you mean. Smooth glass toys have very little friction/drag associated with the surface, and even less with any lubricant. So in that sense, a glass toy would likely insert more easily than say a silicone toy.

If you are basing it on size, an equally sized glass dildo would potentially be harder to insert than a silicone of the same size because the hard material has no give whatsoever.
Contributor: ksparkles16 ksparkles16
In general, glass is much easier and faster to insert than other materials because it is so slick. Now, if it's really huge it may be harder to insert but certainly smoother than silicone (like Kindred said
Contributor: indiglo indiglo
Yep, exactly like Kindred & ksparkles16 said - it's been true in my experience too. It slides with ease, often requiring no lube at all for me. However, inserting can be a bit trickier, especially if the toy is curved or has a larger head. In fact, I have 1 glass toy in particular that I love once it's inserted, but it's really hard for me to insert it comfortably - I rarely use it anymore because of that.