Here is "Some say that kissing's a sin" and an earlier version. No relative of "Seven deadly sins".

Herd's 'Scots Songs', II, 15, 1776.

Auld Sir Simon the King [i.e., tune, not song]

Some say that kissing's a sin,
But I say that winna stand:
It is a most innocent thing,
And allowed by the laws of the land.

It it were a transgression,
The ministers it would reprove;
But they, their elders and session,
Can do it as weel as the lave.

Its lang since it came into fashion,
I'm sure it will never be done,
As lang as there's in the nation,
A lad, lass, wife or a lown.

What can I say more to commend it,
Tho' I should speak all my life?
Yet this will I say in the end o't,
Let ev'ry man kiss his ain wife.

Let him kiss her, clap her, and dawt her,
And gie her benevolence due,
And that will a thrifty wife mak her,
And sae I'll bid farewell to you.

An earlier version

Kissing goes by Favour:
Or, A new composed Ditty, shewing how kissing began when the world began, and is like to continue till the worlds end: Here is also contained may pretty conceited passages concerning kissing, whcih cannot chuse but make all the people merry that will stay to heare it.

The tune is, I marry and thank you too.

To complement and kisse,
some hold to be a sin,
But I can tell you first of all,
how kissing did begin:
First Adam he kist Eve,
and so be got a sonne,
Tis above five thousand years agoe
since kissing first begun:
Since kissing first begun, brave boyes, [Chorus
since kissing first begun,
'Tis above five thousand years agoe,
since kissing first begun,

And after in a short pace,
the world bagan to increase,
Of men and women plentiously,
and then they kist a pace:
And ever since that time,
the trade come on amaine,
And she that hath been kissed once,
must needs be kist againe.
Must needs be kist again brave boys,
must needs be kist again, &c.

And now kissing is us'd,
I think all the world over,
In London, Gloster, Bristow and
in Cicest and Dover:
And in every place beside,
this kissing it is us'd.
I hold it for a practice good,
if it be not abus'd:
If it be not abus'd brave boys, [Chorus
if it be not abus'd.
I hold it for a practice good,
if it be not abus'd:

And now by consequence,
to you I can approve,
That kissing is the readest way,
and nearest step to love:
Suppose a brave young-man
should meet a handsome maid,
To kisse her over and over againe,
he will not be afraid:
He will not be afraid brave boys, [Cho.
he would not be afraid,
To kisse her over and over againe,
he will not be afraid:

At wakes and revills when
young people they doe meet,
They'l send for fidlers for to dance
and shake their nimble feet:
At every dances end,
the brave young blades will kisse,
Their lasses round, whose joys are crownd
what harm can come of this?
What harm can come of this brave boys
no harm can come of this.

Kissing is of such vertue,
'tis never out of date,
Both morning, evening, noon & night
it never comes too late:
Nor can it be refrained,
by any man or woman,
From highest to the lowest degree,
'tis every where so commnon:
Tis every where so common brave boys,
'tis every where so common.

The rich can doe no more Sir,
the poore will doe no lesse,
but when they with their sweethearts meet,
they'l clip, cole, hugge and kisse:
It hath so sweet a smack,
that none can it refraine,
From the Tamberlaine,
unto the weakest swaine:
Even to the weakest swaine brave boys,
unto the weakest swaine, &c.

If kissing comes in kind,
it sweet content doth bring,
'Tis as lawfull for a begger,
as it is for a king,
For if it were not lawfull,
then lawyers would deny it,
And if it were costly,
their clyants could not buy it:
Their clyants could not buy it brave boys,
their clyants could not buy it:
Let kissing be never so costly
some lawyers clarks will buy it.

And if it were not plenty,
young wenches could not have it,
And if it were not dainty,
old widows would not crave it:
And if it were not wholsome,
brave gallants would not use it,
And if it were not toothsome,
faire ladies would refuse it.
Gay ladies would refuse it brave boys
faire ladies would refuse it.
And many of their waiting maids
would not so often use it.

If kissing were out of fashion,
it would soone be laid aside,
By merchants wives in the Exchange
and also in Cheap-side:
Kissing's like Hampshire honey,
'tis wondrous rare and sweet,
Else country John would not kiss Jone
so oft when they doe meet.
So oft when they doe meet brave boys,
so oft when they doe meet.
Jack will kisse Gill, & Ned kisse Nell
when they together meet.

And now for to conclude,
and end my kissing song,
In which I meane no honest man
nor woman any wrong:
But faithfull friend-ship may abound
when folks together kisse:
When folks together kisse brave boys,
when youngmen maids do kisse,
And maidens then kisse them again
not harme can come of this.

Printed for Thomas Vere, at the signe of the Angel, without Newgate.

This is the first ballad in the 'Book of Fortune' collecion of ballads in the British Library. The latest ballad of the 32 in the collection appears to be one of mid-July, 1655.

The tune is a puzzle. "I marry and thank you too", here, is far earlier than the "Aye, marry and thank you too" ballad. See Simpson's BBBM. Simpson obviously realized this, and didn't mention the above as being sung to the later tune.