Is it normal for teenagers discovering sexuality to improvise sex toys? Absolutely. Cucumbers are generally a convenient shape and size. When I was a young male teenager, I used hotel shampoo bottles. (Almost got one stuck inside me, no idea what I would have done.) When the time comes to have that talk, mention sex toys and that if they want to experiment, they should use objects that are meant to be used that way and that you won’t judge them for it. I’d probably also mention that you won’t open packages addressed to them and leave it at that.