Oh, let's see .... where to begin? ....

him nuzzling at that spot on my neck just below and behind my ear ... the ensuing tingles running up and down my spine and dissipating throughout my body

his voice, .... I like accents (including the various American ones), a little gravel in his tone is nice too, but mostly just the sound of a male voice is wonderful if I already find him attractive anyway.

the way he looks at me and tells me (without saying a word) that he likes me just the way I am ... no matter what way I am.