Human mating behavior also involves some competition. Males are generally more competitive than females, but not always. This book shows how humans compete for members of the opposite sex. Tactics are often dictated by members of the opposite sex. Keeping a Mate Keeping a mate is an adaptive problem.
Retention is important.
Lovebugs Fidelity and jealousy have evolved in humans. Jealousy may cover a range of possible actions, as documented in this book. Replacing a Mate Mates needn't be selected forever. We descend from those who know when to cut their losses. Divorce is known in all cultures.