Maybe the problem is me. This album has legendary status and is highly praised by people who show signs of knowing good music. Heck, just take a look at the list of other albums that people who bought Pet Sounds bought, and you will see taste aplenty. But I don't get it.
I have tried and tried to appreciate this album, but it just bores me. It seems shallow, artificial/insincere, cutesy and repetitive. The boys sure can harmonize and I appreciate that they were doing things that were groundbreaking in their day, but it all comes across (to me and many others) as lacking in feeling and energy - the songs remind me of commercial jingles. I suspect that the album is just massively dated. America produced a lot of incredible albums in the 1960s, but I cannot hear why this is one of them.
Get yourself some Beatles, some Bob Dylan, some Janis Joplin, some Hendrix, some Velvet Underground, some Joe Cocker...and *borrow* a copy of Pet Sounds. Spin Pet Sounds a few times and see if you think it deserves its reputation. If you like it, buy your own copy and adopt it. If you don't, smack it with a rolled up newspaper and shoo it away.