I felt invisible in my 20s on occasion, for all the wrong reasons. My first career was in accountancy, not horticulture, and I was sent along to a dinner for the local chamber of commerce to represent the large company I worked for, as my boss's wife had a baby that day. I was seated at a table of middle-aged men who all looked at me briefly in disgust. It was pretty obvious they thought my boss had sent his secretary - yet most of us must be aware that secretaries can be pretty powerful and know lots of exciting titbits! Having long blonde curly hair and big boobs obviously eliminated all chance of my having any brains, as far as they were concerned, and at 25 I was nowhere near as confident as I was at 40. We were at least halfway through the meal before I was able to get a word into the conversation. I bet they would have treated a going male differently, but if it had been all ladies instead, they would have been drawing a young male out right from the start and teasing him. That dinner still rankles. But it made me very determined to introduce myself loudly after that when I met new people.