Part of the beauty of the spell, of course, is that one under the spell doesn't realize anything out of the ordinary is going on. SO even Wes, with his vast knowledge of the supernatural, was oblivious to the fact that his growing feelings of attraction weren't completely natural. His only possible salvation is that, in time, it would become obvious to others who could do something about it.
But not before the witch could have some fun with him, of course.
Wes swallowed hard as her soft fingers stroked over his face and she breathed warmly on his skin. Her smell seemed to flow around him, tickling his senses.
"Well, thank you. I...thank you. Mine is but a plain and boring face next to yours, though. I could look at it all day."