Thank you so much! And I don't mind questions at all!!
!!! SPOILERS !!!
There isn't a way to unlock the option to tell Papyrus, unfortunately. That option is really there to convey just how futile trying to take control in that world is.
However, there is a way to convince Baggs to roughly kiss you! You actually won't get to select it... but it happens through another option. Once "Kiss (Rough)" appears, then you have to spam "Provoke" in order to, ahem, convince him. And he'll take it from there. ;)