Describe kissing physically and emotionally.?

Today at work, my friend was telling me about a date she went on last night. She said that when she kissed the guy it was like she was floating or...idk. you know those descriptions and similes people use when they talk about kissing lol. And I was thinking, is it really as indescribable as she made it seem? When asked how it made her feel, she just said she couldnt describe it. I mean, i don't think it's that hard. It just left me wondering. So describe how kissing makes you feel physically and emotionally, and try not to use any cliches. The person who I feel has the best description wins.