IIN that I want to leave my friend with benefits for an older woman?

Ok but here's the 'problem'.

What happens when you get bored with this new chick (and you will)?

Then it's the next chick, rinse and repeat.

After awhile you'll probably develop a pattern that will destroy your future relationship with a girl you actually want to keep.

Not only will you probably never trust girls (my problem) because now you know they're all basically sluts but you'll also probably turn into a chronic cheater because no girl is 'exciting' enough for you.

ALL relationships get boring if you're with the person long enough.
ALL relationships have periods where both people would rather be screwing someone else.

I totally get where you're coming from but developing habits/patterns like this are really dangerous.

It's also one of the reasons why casual sex can ruin your life/serious relationships.

Girls do the same thing, jump from guy to guy just because they get bored and then boom, too late they cheat on whoever they're with and ruin their lives because they've developed that habit and the emotional justification to support it. Plus it's so easy to cheat.

Think about young girls that get molested at a young age. They unknowingly or knowingly carry that sexual / emotional baggage with them 'forever' and that affects all of their relationships.

Therapies and techniques can fix these things but usually people don't 'get help'.