Welcome to the forum Ethan. These looks like molluscum contagiosum to me. These might have been transmitted during sex. Once they are there they can be transmitted to different area of your body through autoinoculation (self transmission from scratching), so make sure not to scratch them. Sometimes genital warts might also look like these..Anyway do you see any dimple or central depression in any lesions? Are they smooth on touch? You can apply vinegar on the lesion and see if they turn white (HPV, genital warts).