Me and my wife have recently discovered that she likes stretching, and are looking to jump in it fist first.  Now my question is I have seen people use all kinds of stuff for play such as cans or bottles and would like some information on using them.  I have heard if you use a glass bottle drinking side first it will create a suction and get stuck is that true?  My other question was id you use a can or the big side of the bottle 1stor how do you get it in there since there is no narrow end to work up to it?  And if you have any other information related to this such as other fun toys and what not please share we are noobies and have never used anything other than toys that are made to be sex toys...thanks everyone

I would also suggest no glass. Blunt end first is only going to happen if she's prestretched and already open to something that size.. As far a suction, and I assume your speaking of stretching her pussy, unless she is prone to queffing, Pussy farts, once her lips seal on the bottle it will create pressure, not suction. Your introducing an open void into an already sealed area. To accept this extra expansion pressure will be created in the most compressible part. the air in the bottle.

do you really want to find out the hard way? i know my gfs does when she clamps down it hurts my wrist or somthing else

Lots of people on this site use bottles. I use bottles. That video is a classic, widely watched and widely feared. But try breaking a beer bottle by squeezing it with your hand. Your ass is no stronger. Nor is your girlfriend's vagina.

A drinking glass is likelier to be weaker than a beer bottle.

As for vacuum, the body has an internal pressure that's essentially equal to atmospheric pressure. There's not a suction problem, regardless of which end goes in first.

K+ to owen for the good, simple advice.