Someone told me that if you put pressure on a seed and it cracks then it would have been a male, and if it doesn't, its a female. I think this is BS, but is there any truth to this theory?
If it cracks it means....wait for it....the seed case probably was already cracked. What that means is that it likely is not viable (won't sprout). Can't read anything else into it.
if you put pressure on a seed and it breaks, that means you crushed it and its gonna be neither male nor female.