Obsessed with big cock

Whenever I see big cock. Especially attached to a trans or another sissy, I instantly feel super submissive and just start craving cock and cum in my mouth. What is it about big dick that just makes me feel like such a bitch? I’m sure all of us sissies can relate to loving cock, but I want to know what is it about a big hung dick that drives me crazy. Maybe im thinking too much into it, but if anyone has any answers I would appreciate it :)