Who sang this early 1970's pop/rock song?

[Diana]

I am at a loss as to the name of the song and artist from the early 1970's, whose lyrics I can only partially remember contain the following:
"Oh, please (baby) go all the way..Its been so long (been so long), being with you dear, baby I say please (baby) go all the way.."
I remember this song was played on AM radio stations, was sung by a male who had a lovely vocal range, and the song itself had some nice changes in it.
Also, the first ten seconds of this very song was featured in the movie, "Almost Famous". The scene featured Phillip Seymour Hoffman, while on the phone with the young journalist. Hoffman was playing this song on his record player, then lifted the needle up and replaced the above album with a completely different one. Hope this helps ring a bell. I really wish to purchase this group's music. Thanking you in advance,
Diana

[Daddy Dave]

It might be "Go All The Way" by The Raspberries. Then again, it might not. Worth a try, anyway.


"Go All The Way"
I never knew how complete love could be
'Til she kissed me and said, baby

CHORUS
Please, go all the way
It feels so right
Being with you here, tonight
Please, go all the way
Just hold me close
Don't ever let me go

I coudn't say what I wanted to say
'Til she whispered I love you, so

REPEAT CHORUS

Before her alone, I was cruel and mean
There was a hole in the place where my heart should have been

But now I'm changed, and I feel so strange
I come alive when she says all those things to me

And she says (come on)
Come on (come on)
(come on)
Come on (come on)
I need you (come on)
I love you (come on)
I need you (come on)
(come on)

REPEAT CHORUS

[Diana]

That was it! You know the song, and supplied the group's name and lyrics!
I will finally be able to purchase The Raspberries music, Thanks to you.
Any future vintage music trivia shall be immediately deferred to your expertise.
Again, I really appreciate your immediate and accurate response.
Thanks, and have a great weekend,
Diana