You must love us!

While tucking my kids in bed tonight I was giving them kisses.  I love to kiss them until they are laughing.  I had just finished Mason and Elly and was headed to Tyler when Elly said, "Mom you must really love us."
I asked her why she thought that and she said, "because you always give us kisses."
I wish that was all it would always take for my kids to know that I really love them.