Breast Wireless Clamps Vibe - Perky Nipple Booster
You will love the vibrations and the adjustable clamps on these, they wont fall off if your sexual activity is rigorous and for a first timer these are super fun as they add some spice to sex life.
You can use them during solo time but it could easily be something fun to do with your partner. If you are not sure about nipple clamps, you might want to try pressing a vibrator hard on your nipple first to see if the sensation is something you like.