Loving more than ONE person

So last night, hubby and I were talking about an interesting topic on the radio earlier in the morning:
Loving someone else when you're married to another.
It made good talk, and offered us an opportunity to evaluate our marriage- 9 blissful months of marriage!
Crux of the matter is he was surprised at how many persons sent text messages to the discussion saying they loved someone else as early as 3 months after being married to another"...and i went like "babe, are you trying to tell me you havnt had emotions for another or liked some other girl/woman out there in a more than friendly way since we got married?"..and of course his obvious answer was "hell no" lol...flattering...but i really wouldn't have been bothered if the answer had been "yes i have".

The way I see it, LOVING someone is a choice...its a decision to pick out of an array of persons you are attracted to, one to exclusively muse, admire, dream, and have restless nights about. Marrying someone for that matter involves taking a decision, to FORSAKE all others you admire/like/love to be with that one person you've chosen.
I guess different people marry for different reasons: for some its based on physical attraction..and the intent to bear genetically perfect children-kids without blemish!, for others its purely for financial safety, reassurance that all will be well, for others, out of pity....and yet others out of desperation...because guess what..." their biological clocks are ticking"(unfortunately us women are the majority in this category).  Why did I marry my husband? I guess i can share a secret or 2 here:
1: He's presentable. Yes in as much as I'll love to hang off the arms of a HUNK..my husband aint the finest man on the universe, but i sure don't feel like having the earth open up and swallow me up when i'm seen with him. (He's got flaws, some i nag about...and unfortunately may never change)
2. He's responsible: He takes care of his mess- i think i fall in that description. lol
3. He's patient: He'll never lift a finger at me...no matter how angry i make him.
4. He's liberal: Doesn't insist on us doing things his way always. (well, most of the time...there's that one issue we have to sort out)
5. He's a forward thinker: He thinks about our future and wants to make hay today to keep us comfortable. I appreciate that he learned from his fathers mistakes and would rather be buried alive than repeat them.
6.He loves me: In all the ways imaginable.

So why would anyone marry someone..and start looking elsewhere as early as 3 months into marriage? I'd like to know your opinions on here...then I'll share what we discussed and what most people think.