You may also experience exploration at the breast. Children who are more physically capable can have shorter breastfeeding sessions but much more active ones. Expect your child to try new positions, climb all over you and the furniture while still latched on, and try newly swollen gums and teeth on your body. As your child learns to communicate, they may use this new skill to request a breastfeeding session or ask for one breast over the other.
The American Academy of Pediatrics recommends breastfeeding beyond the first year "as mutually desired by mother and infant." So as your child ages and your breastfeeding relationship changes, you may want to consider setting limits that will make your continued breastfeeding comfortable for you both.
Some parents find it helpful to set limits on when or where breastfeeding is available. For example, restrict nursing to just before bedtime or just after waking. Or try using the same chair for nursing as much as is practical -- having a set routine can limit your nipple negotiation. As long as mother and child are both comfortable, the weaning process can take as long as you want it to.