How to use something in the condom?

It depends on the specific situation. Sometimes you buy condoms in large quantities, and the merchants will send things in them, sometimes other kinds of condoms. For example, when I went to a treasure flagship store to buy extended condoms, they gave me a lock ring, but there was a description in the little thing you gave me. If there is no explanation, you'd better ask customer service. Try not to use it until you understand it. They also sent other types of condoms, such as tight ones, which felt different.

Hope to adopt! Thank you~