@edwardlou No, Sawada-kun enabled her and let her perversion grow and become worse. Not everything is a woman's fault just because you types think it is... :/
Though, I'd say it's the development of a healthy relationship.
He gives her what she wants, and she's slowly giving him the space to find out what he wants from her.
That's healthy.
1) Give HIS crotch some loving too, girl. It's always only you.
2) Asfixiation play without research is a big no-no.
3) Dangerous play without a safe word is a big no-no.
@EdenSphinx In any BDSM circle. You can find them online, but if you're like 80% of guys (and I'm not saying you are, mind you), you won't actually find one. Notice how this pretty decent manga goes: it's about trust.
Even if a woman is an M, she's not going to be willing to be tied and used by a random dude she just met. It's scary. She needs to trust her partner. And in those circles you usually find guys with a pic of their pp as avatar, and they get tired if no woman is spreading her legs after a few days, so...