Staying soft is not especially a sign you
Having an erection is a physical proof that you are aroused (also as a cuck) but not having a boner is not the proof that you are not aroused. Next to the physical aspect of being aroused there is also the mental aspect that you can be aoused without having a boner. Lots of men with physical ED and unwanted and wanted ED such as subs and total bottoms are quite aroused without having a hard cock. With time erogenous zones move more to your ass and between your balls and ass and nipples and you get shivers on these places, precum and wetness in your ass.If your not aroused watching then you have a problem