It sounds a bit like 'to/do your most', but I really can't tell. What do you think?
Most interpretations suggest the first word is "to". But I hear a sibilance "tss" right at the start. As if it's the end of another word that had been cut off.
The first few times I heard this song I thought the line in question was "To young love. Then I heard "To your mother" like a lot of others have said.
Yes, but you don't actually hear the word 'mother' do you?