A have a little bit stupid question... Is there any difference between 'tits' and 'boobs' in English? Personally, when I think about boobs, I think about big naturals - e.g. Gianna Michaels. Tits on the other hand are for me smaller and firm (and possibly fake) - e.g. Natalia Rossi, Jesse Jane etc. But really, is there any 'official' difference? And are these expressions considered vulgar in English (in comparison with 'breasts')?