Writer's Block: Pecking Order

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I'm the oldest of three girls. The situation in which we grew up led me to be part sister and part parent. It's an aspect of myself that I don't seem able to lose.

Can someone translate this nonsense?

I am totally clueless as to the appeal of Lady Gaga. But I was listening to "Love Game" on the radio in the car this afternoon, and I do not get it at all.

To wit:

You've indicated your interest
I'm educated and sexious

Educated and WHAT? What is that word?

Also, what does "Let's have some fun, this beat is sick" mean? When did sick become a good thing?

I feel old.