I get that, and instead of using turtles as a example I should have said “ a female who collects male wrestling figures” or something like that. The Point was to highlight that when a female collects something that is usually meant for males, then it’s not a big deal. But if a male collects something that is usually meant for females then he is ostracised for it. And keeping a secret like that can be just because the person doesn’t want to be ostracised, belittled or have any other negative stuff sent their way.
But as you said, just cos a male collects dolls, it doesn’t mean he’s automatically a sexual deviant.
However I totally get that in this instance it may very well be linked, and is a very strong possibility.