Why do we want male chastity to be normalised...

Yes, I would. One could make a very strong case that being into chastity or other forms of BDSM is as much sexual orientation or identity as any of those other things... "I was born this way..." is one way to look at it.

Besides, have you seen what goes on in a Pride parade?

 

My feelings on this subject are as follows: I really want my girlfriend to feel empowered and comfortable being in charge and have the confidence that society has told her is not her place. I do so much better when locked in all aspects of my life. The level of trust and connection I feel when she locks me up is amazing. I'm not sure if it is so much a normalization aspect but the ability for partners to accept and celebrate each other living their best life without the fear of being judged and negatively affected.