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 Inconjunct Neptune
You may experience difficulties with your romantic partners inability to understand relationship boundaries. Disappointment and romantic illusions can shatter your dreams about your partnership unless you are both very honest about your feelings and intentions. When the Venus person is inconjunct the Neptune person, they are partly attracted to a made up version of you fabricated to meet their romantic desires. Learning to distinguish reality from illusion and being strictly honest about yourself will help both of you connect with the real world versions of yourselves.