I have been dressing since I was 3 or 4 an it came on full blown at puberty.
I have to say at that time it may have been sexual but at 12-13 I was full of raging hormone anyway.
Now in my fifties, it is just a way to look how I actually feel inside. Not sexual at all.
I grew up thinking I was CD and as I got older I realized I was TS and unfortunately nothing I can do about it but live as I can.
