A dildo with a suction cup base would be a good choice for you. It has attachments that you can change out. You can use a regular dildo or a dong without balls. There are also many colors that you can choose from. There are complete sets and they come with harnesses. Our Supreme harnesses have straps. You could put it on either side of your chastity belt, on either side of your penis. Good luck to you in trying not to get too excited while doing this in your chastity device.