Why should he deny himself his most primal desires?

Gary is thrilled to pass on his wisdom, happily chatting away with her while he sets to work. Although he's being nothing but friendly, Amelia continuously interprets everything he says and does as being him coming onto her. By the time he realizes this, it's too little too late. As Amelia comes onto him more obviously, Gary tries to resist but she toys with him, insisting that she knows he must have feelings for her, too. Why should he deny himself his most primal desires? Gary keeps trying to do the right thing and ignore the growing heat between them but once she strips down in front of him, he's putty in her hands.