[ Any or all of the above. If she needed it, if she wanted it, if he wanted it, if he needed it, if she felt like trying it, if she thought it might work, if she just had a passing fancy, if she had a passing fancy that didn't pass and stopped, if it was the control necessary, if it was the care-giving necessary, if it was with her, if it was for her, if it was demanded, if it was requested - honestly. At this point, basically any or all of those reasons would be legitimate enough. He doesn't understand all the fail-safes, just that they're there and she experiences pain and extreme discomfort if she physically harms him - maybe she likes that feeling, he doesn't know. She's never pegged as a masochist, or a sadist for that matter, but hey. People can surprise you.
This time though, only in as much as they can meander outside a usual relationship while remaining within boundaries that go along with said relationship. His eyes flutter shut without thinking about it as she gets close - maybe even hits once or twice - that perfect angle she's been looking for. One of them anyway. There's probably one that's perfect for each of them individually and one that's for them both, he has no idea which one that was, just that for a moment he wasn't sure whether to relax or tense further or what. ]
you're going to threaten my /love/ now that's just mean
This time though, only in as much as they can meander outside a usual relationship while remaining within boundaries that go along with said relationship. His eyes flutter shut without thinking about it as she gets close - maybe even hits once or twice - that perfect angle she's been looking for. One of them anyway. There's probably one that's perfect for each of them individually and one that's for them both, he has no idea which one that was, just that for a moment he wasn't sure whether to relax or tense further or what. ]