Recently i listened to a music called "Under my skin" sung by Sarrah Corner. The following is part of the lines of the song.

when we touch i can feel weve got a chemistry
cant get enough
watch out when you stand so close to me
i've got you under my skin

I feel that the lylic includes sexual meanings. But the meaning of the last line(Ive got you under my skin) of what i posted above does not come to me. Some say that means "I got you laid". But I am stilll not sure. Could you give me the exact meaning of the line?