Can I be pure in heart and still be a sexually charged guy?

I don't think being "pure in heart" means being a desexualized person as some idiotic christians claim... I am a christian guy myself, btw. I know lust is not a good thing or sexual immortality (subjective definition..?). Well im 18 yrs old guy so obviously i'm at my peake and testerone is super high right now lol.