The machines used thesedays are no longer “X-Ray” machines. They are not looking for metal items, they are thoroughly searching the contents of the bag and the scanners they use provide an absolutely incredible view of the contents of a bag.

So, yes, they can very vividly see whatever it is that you have inside that bag.

Travelling with sex toys is far from an unusual thing however. A TSA agent will see something like that go through the machine many, many times a day. They are, by and large, discrete professionals. If they see something in your bag that may be offensive and/or embarrassing, and if it so happens that they need to search the bag, they will ask you to go to a private room before they search your bag in the open.

Keep your toys in a small sealed bag within your luggage with no liquids or especially dense items (like books — the machines can’t see through them well, and they may elect to hand-search around them) around them that could provoke a search, and they won’t need to go probing into your personal items.