This is the holy spirit when feeling sexual longing for a person that is not your spouse
I don't normally share these things, but I had a great experience one morning years ago immediately - and I mean instantaneously - upon awakening.
I was teaching at the time and always in the Word, night and day, studying and in prayer learning. I would at times get to a state I'd call 'saturated' - a great place to be.
One morning I awoke, and my mind went instantaneously into full awake mode and my first thought was something in line with what we're discussing. Then just as instantaneously my thought was 'prompted' to reject that thought. Then just as instantaneously the thought was gone. By 'instantaneously" I'm attempting to convey that this was as all in as if a microsecond but extremely focused and concentrated in full awareness.
Then came the back to normal consciousness mode. I thanked God for His lesson from His Spirit showing me what He's here to do for we who desire to know Him.
I go to this verse when I need it for the help in the battle at the thought level against sin:
NKJ Heb. 4:14-16 Seeing then that we have a great High Priest who has passed through the heavens, Jesus the Son of God, let us hold fast our confession. 15 For we do not have a High Priest who cannot sympathize with our weaknesses, but was in all points tempted as we are, yet without sin. 16 Let us (command) therefore come boldly to the throne of grace, that we may obtain mercy and find grace to help in time of need.