I'm going to be blunt here for a moment.
You're wrong. Massively, completely, utterly, totally fucking wrong. And wrong about multiple things as well!
Men love boobs. Men love big boobs, men love small boobs. Men love pert boobs, men love droopy boobs. Men love boobs with big nipples, men love boobs with small nipples. Men love firm boobs, and men love boobs they can rest their head on and sink their head into. Men. Love. Boobs. (Source: Am male)
Some men have preferences on the type of boobs they like, but mostly, the type of boobs that men like are the ones they're in with a chance of touching, or seeing.
Your big mistake @islaw3048unfln , is that you're mistaking "better" for "more noticeable". Bigger breasts draw the eye, just like anything else that's in your face does. I watched a film with Natasha Lyonne yesterday. Most people's reaction when they see her in something is "Whoa, big hair!", to the extent that when I saw her in something yesterday in something without the hair I genuinely didn't recognise her until she opened her mouth.
But big hair isn't a secondary sexual characteristics, so people don't make the leap from big hair = more noticeable = sexier. So yes, page 3 and porn video covers and assorted other media use women with large breasts, because it makes them more obviously noticeable at a glance.
Your point about noone fancying someone because of their confidence is also wrong @islaw3048unfln . I've lost track of women I've known over the years where one day I've suddenly gone "Bloody hell, she's hot" after years of not noticing it. And it could be anything that causes it. To give a few examples in my experience - A hair colour change, a particular outfit, a laugh, the movement of her fingers across piano keys, a put down of an arsey customer, and yes, in one case, a particularly low cut top. And in the case of DP of 20 years, it was when she finally stopped listening to the little voice inside her head telling her she was ugly, and started believing what other people were telling her.
Big boobs are one of myriad different aspects of a person that might get them noticed by the opposite sex, and they might be the thing that triggers an initial "I fancy her". But past that point, 95% of men won't give a shit about the size, they just want the opportunity to get to know you.
Fucking hell: Yesterday I'm winging about the prevalence of pervy men on Mumsnet, today I'm writing a treatise on tits!