Venus shows what a man is attracted to in a woman. Being with a woman who is strong in his Venus element, or who makes close sextiles to his Venus makes the relationship much easier, and increases sexual desire and compatibility. For a woman, her Venus is part of her feminine nature, so it is definitely best when her partner also relates well with this element. When people have positive Venus synastry, they naturally like and love each other. That, of course, is what makes positive Venus synastry so great.
Venus Opposition Neptune
The more you chase the love of your dreams, the more lost you get in yourself. Your romantic partner is a very real person. You may prefer to idealize your image of him/her in an aura of glamor and romance, but you are overlooking an opportunity to bond with a compassionate partner if you choose to view the dream rather than the reality. If your romantic's partners Venus is in opposition to the Neptune person, there's a good chance they will get so caught up with being in love with love that they will never really know you.