Don't know if you've come across John Donne, but he was a 17th century poet, famous for his somewhat saucy love poems. You could always use just one or two verses from either of these works (I blush in retrospect to think I made my poor FIL read all three verses). I particularly love The Sun Rising as it's basically about not wanting to get out of bed .
The Good Morrow, by John Donne
I WONDER by my troth, what thou and I
Did, till we loved ? were we not wean'd till then ?
But suck'd on country pleasures, childishly ?
Or snorted we in the Seven Sleepers' den ?
'Twas so ; but this, all pleasures fancies be ;
If ever any beauty I did see,
Which I desired, and got, 'twas but a dream of thee.
And now good-morrow to our waking souls,
Which watch not one another out of fear ;
For love all love of other sights controls,
And makes one little room an everywhere.
Let sea-discoverers to new worlds have gone ;
Let maps to other, worlds on worlds have shown ;
Let us possess one world ; each hath one, and is one.
My face in thine eye, thine in mine appears,
And true plain hearts do in the faces rest ;
Where can we find two better hemispheres
Without sharp north, without declining west ?
Whatever dies, was not mix'd equally ;
If our two loves be one, or thou and I
Love so alike that none can slacken, none can die
The Sun Rising
BUSY old fool, unruly Sun,
Why dost thou thus,
Through windows, and through curtains, call on us ?
Must to thy motions lovers' seasons run ?
Saucy pedantic wretch, go chide
Late school-boys and sour prentices,
Go tell court-huntsmen that the king will ride,
Call country ants to harvest offices ;
Love, all alike, no season knows nor clime,
Nor hours, days, months, which are the rags of time.
Thy beams so reverend, and strong
Why shouldst thou think ?
I could eclipse and cloud them with a wink,
But that I would not lose her sight so long.
If her eyes have not blinded thine,
Look, and to-morrow late tell me,
Whether both th' Indias of spice and mine
Be where thou left'st them, or lie here with me.
Ask for those kings whom thou saw'st yesterday,
And thou shalt hear, "All here in one bed lay."
She's all states, and all princes I ;
Nothing else is ;
Princes do but play us ; compared to this,
All honour's mimic, all wealth alchemy.
Thou, Sun, art half as happy as we,
In that the world's contracted thus ;
Thine age asks ease, and since thy duties be
To warm the world, that's done in warming us.
Shine here to us, and thou art everywhere ;
This bed thy center is, these walls thy sphere.