Love, lust, relationships, marriage

Let's say honestly - sex it's the main reason we do anything.
When a woman is on diet and/or do sports to have beautiful body it's all about be attractive as sexual object.
When a man do sports it's all about sex too.
Women's clothes it's all about sex.

And we all love new sensations. New sex with new person is attractive to you it's what makes us hot.
Women can have sex all the time. Women's PMs is full of sex offers in any site including this one.
If a women have relationship and love do they want fuck other men ? If do , do they love their husbands yet?