Im thinking hygiene here. If my gf was to use her glass dildo on me would it then be okay for her to still use?
Obviously it would be cleaned etc in between sessions
Shouldn't be a problem as glass is non-porous and easy to clean and sterilise. If it wasn't for my kids, I'd put mine in the dishwasher!!
You can boil them I think - that'll get rid of about anything!