Most Helpful Girl
All a person can do is make an assumption.
If the person is a "bad kisser" a person may assume he/she never had a kiss before.
That isn't always true in every case, the person could have had very little experience.
On the other hand,
A person that is a "good kisser" is usually said to have had a lot of experiences.
This isn't always true, it's possible you are this person's first experience or one of their first.
Some people read a lot about sexual things before they actually before them.