It depends what kind of sex toys they are. If they have batteries/electronics in then they should never be thrown in with regular household rubbish. There are special small electrical item bins that you can use to dispose of those (you can check what facilities are available in your local area), or you can post them to Lovehoney and they’ll sort them out for you.
https://www.lovehoney.co.uk/help/lovehoney-and-the-environment.html
Anything else can be recycled depending on the material, or you can chuck them in a general waste bin in a pinch.