Hmmm.... q-tipsss, Liz V......a tease called "Prove it" ... maybe?
Type "Q tip" into the search for the list..... 5 or 6 teases I think.
As for danger, I'm not a pro. But like with anything, I believe there are 'best practics'. I never put the q tip all the way in. That would be an interesting explanation to your doc if it got lost

! I had always made sure the cotton tip was very secure first. I'd not want it coming off while inside me. I also use a very clean/sterile lube and I drink plenty of fluids beforehand. The cleaner you are while playing, the better. Peeing a lot afterwards lessens the chances of a bladder infection. After all, the q tip is irritating the sensitive skin/nerves inside, and foreign objects can cause bladder infections. Graduate beyond q tips. That is the best option. There are toys out there that are safer and better suited for insertions (and can be sterilized before/after).
If you like penile insertions, have you tried sounds? There are also certain metal chastity devices with insertables

. Also maybe prince's wands or plugs? Decent links below:
http://www.medicaltoys.com/lib-soundplay.htm Sounds and advice
http://steelwerksextreme.com/blog/ Chastity with insertions
http://stockroom.com/Sounds-Dilators--Jewelry-C179.aspx Sounds, plugs, lubes...
Have fun, be safe.