When most people's first experience of sex is less than stellar, I find it not an unreasonable idea for her to consider trading this initial underwhelming experience for 4 years of higher education.
And Texas Ranger -- just because she's from NZ and she's 19 you presume she's not a virgin? Lots of folks from western countries haven't had sex by then...don't be so presumptuous.

"I wish I could drink like a lady. I can take one or two at the most. Three and I'm under the table. Four and I'm under the host"
-- Dorothy Parker