If he wanted a submissive, he should learn that he should be giving in to her boundaries and playing according to those boundaries.
A healthy bdsm relationship isn't about his needs and kinks. It is about what works for her. It is poetic and nuanced. It looks like he is in power but all his power is defined by her.
Also, you don't know one another that long. He is very shallow and creepy to seek out kinks before negotiating feelings long enough. At least to me that is a red flag.
