No, kissing with a lip piercing generally isn't hard.
While the presence of jewelry might seem like an obstacle, kissing someone with a lip piercing or kissing with a lip piercing shouldn't be drastically different from a normal kiss. You might need to adjust slightly to the sensation of the jewelry, but overall, it shouldn't present a major difficulty. According to the reference, "kissing someone who has a lip piercing (or when you have a lip piercing) shouldn't be much different than a normal kiss. Sure you'll have to navigate the strange sensation of a piece of jewelry in your way, but all in all, this shouldn't provide too much of an obstacle."
Think of it like this:
- Getting Used To It: Both partners might need a little time to adjust to the feeling.
- Angle Adjustment: A slight change in the angle of the kiss might be necessary.
- Communication: Open communication with your partner can help navigate any initial awkwardness.