gonna suck on your tittie

The story:

Actually, it was my sister who made this embarrassing mistake.
One day we were riding in the car and she heard the song on
the radio and made a face and said 'That's just disgusting!' I
thought she was referring to the 'Wham, bam, thank you ma'am'
line, but she said no, it was the other thing. I said 'What do you
mean? What's the other thing?' She looked at me like I was a
complete ignoramus. Then when the line came up, she pointed
at the radio and said 'There! Right there! That's so rude!'
Confused, I said 'Suffargette City? What's rude about that?' Her
face went a little red, and I had a bit of a time getting it out of
her, but once I knew she thought he was saying 'suck on your
tittie', I burst out laughing, and to this day, I seldom miss a
chance to embarrass her with this story.