Most people use their stomach, but you can also use the hips, thighs, buttocks and arms. If you use the cannula, it is inserted via a hollow needle which fits over it. This is inserted into the skin, the needle is then removed, and the cannula stays in place. The end of the infusion set is then taped down to your skin so that it can't become dislodged. Well, yes and no.
Some people find it takes time to get used to.
But after a while, you don't notice it. And most infusion sets are disconnectable . This means that you can detach the tubing from the needle or cannula for short periods. The tubing is sealed so that nothing can get in or out of either piece while it is detached. So you can have a shower, go swimming, get changed, or have sex without having to worry about the pump getting wet or in the way.