Monogamy if respected and entered into whole heartedly can be a very secure relationship.
Secure from STD s of course, but also secure because you are placing your heart in the hands of only one other person. They are entrusting their heart only to you.
Security is a really big deal in society today. People pay to have their house secure, their children secure, their money secure, the email conversations secure, and their phone conversations secure.
I guess one could reason that security could lead to boredom. I suppose that can be directly related to home security. It might be boring to be safe every night, but would you like the adventure of having a rapist or serial killer enter your home after dark when you are sleeping peacefully?
Monogamy is also simple. I like simple, my job is complicated enough dealing with the dynamics of Marines from all walks of life and all backgrounds. You don’t have to juggle favorite aspects of different people, you just have to concentrate on one person’s needs and you can be the master of what works with them, instead of being the jack of all trades sexually for different partners.
You don’t have to worry about what nights are group sex nights and what nights you are with mate #1 and were you supposed to make love to mate #3 tonight, but she canceled because of a headache and your other mates are with their other lovers on that night. I don’t need all that complexity!
I say monogamy is simple, but I should have said simpler, because it is as complex and spontaneous as you want to make it. the more baggage and more issues that are brought into it the more complex and interesting it becomes, and also the more potential for growth. The more a relationship overcomes to closer the ones in the relationship become.