When a male wolf spider finds a female, he will perform a courtship dance involving waving his front legs and vibrating his abdomen. Often the female will respond by attacking him. If he persists and is lucky, he will be allowed to climb onto the female and mate with her.
I assume the wolf spider in my photograph is a female specimen of Pardosa lugubris. If this is the case, the female (7 mm) is larger than the male (5 mm).