My Dad used to tell me as a young girl that the couples who are giddy and all over each other... never last long. That's lust, not love. This from a man who was married 61 years and saw LOTS of break ups. As I "age"

I tend to believe him.
Bevin turned him on because she was CRAZY about who she thought he was... face it, they can't really KNOW each other that well. All men love to be adored, even Andy, who surprisingly, had the best morals of most of the Bachelors so far. He was serious about who he wanted to spend his life with, and he was attracted to someone who was cautious and realistic. Notice how he got rid of nearly ALL of the Barbie types QUICKLY?
Bevin was needy and clingy. Men like that for a while but it gets old quickly. She seems to have lots of insecurities.... a walking time bomb.
I think she needs to find herself before she cleaves onto another person. Two half people do not make a whole, two whole people do.
As for her being the next Bachelorette, I don't know. I'd take Danielle before her.
And about that sex study...

WAAAAY to impress the new in-laws!!!