Buttplugs

I have a question

I started playing around with the idea of a buttplug for the first time ever and at around 15cm the plug stopped and as i pushed it further it caused some discomfort

Is this the "it only hurts the first time" barrier or my limit for how big a plug to use??

[Like Ra]

at around 15cm the plug stopped and as i pushed it further it caused some discomfort

The rectum length is 12-15 cm. So, don't push the plug any further unless it's flexible enough to make an almost 90 turn to get into sigmoid. For example, this plug ( http://www.likera.com/eq/plugs/plug3.html ) is made out of very flexible silicone and I can get it completely in. 40 cm!

More useful info:
http://www.bartleby.com/107/pages/page1183.html
http://en.wikipedia.org/wiki/Butt_plug