Okay, so tonight me and my boyfriend were together and he decided to lick and suck on my nipples... (which he's done plenty of times before) and now they're verryyy sore. Is there any specific reason that this is the first time I've experienced sore nipples from this particular connection with my boyfriend? ANY answers would help. Thank youu! :]

Maybe you did this longer or he did this with more force than before? This is common you don't need to worry.