What's the difference between sexual thoughts and normal sexual attraction (between a man and a woman)?
But we being humans in our current state of imperfection will look at people and have these thoughts.. But if we believe Jesus and trust in the atonement Jesus has provided to pay the penalty of all our sins then all will be well for us in eternity..
Once our ancestors obtained the knowledge of Good and Evil we where all doomed to sin and we all do sin.. So it is pointless for us to try and resist the revealed will of God and try to make our sins no longer sins simply to make us feel better about ourselves.. The best policy when it comes to Gods will is to accept it all without resistance and have absolute confidence in the Atonement that God has provided for our transgressions.. Those of the past.. those of today and those of the future till the day we die..
As i said before salvation is so easy for people who just accept the Word of God with Zero resistance.. Salvation is a true free gift as easy as drinking water.. Easier in fact..