History. Dildos in one form or another have existed widely in history. work The Choice of Valentines mentions a dildo made from glass.
The fact remains that dildos made of carved stone or bone were widely . Glass dildos are available in lots of different sizes in nearly infinite.
Luckily, nowadays we've moved on to more vagina-friendly silicone-based lubes and latex condoms, but have our glass dildos made the same.