Blunt sexual interest:
"Hey baby come back to my place and let's fyck." While you're grabbing her ass.
Only a slytty girl would go along with this.
Subtle sexual interest:
Being in a sexual state and looking deep into her eyes while establishing rapport.
"Oh really, you're interested in learning guitar? You know I've been playing for a little while and can show you a thing or too."
Girls know why you want them to come back to your place but they need a reason to rationalize it.
"I didn't mean to go over there to get fyck sideways but so he could show me how to play guitar."
Also being scared of your sexuality is a nice guy trait, while embracing your sexuality is an Alpha Male trait.