Last night, ah, yesternight, betwixt her lips and mine
There fell thy shadow, Cynara! thy breath was shed
Upon my soul between the kisses and the wine;
And I was desolate and sick of an old passion,
Yea, I was desolate and bowed my head:
I have been faithful to thee, Cynara! in my fashion.
All night upon mine heart I felt her warm heart beat,
Night-long within mine arms in love and sleep she lay;
Surely the kisses of her bought red mouth were sweet;
But I was desolate and sick of an old passion,
When I awoke and found the dawn was gray:
I have been faithful to thee, Cynara! in my fashion.
The ‘kisses of her bought red mouth …’ are clearly those of a prostitute. Dowson has used a woman for physical relief, but his mind is on his ‘old passion’. This is a contrast to what went before; definitely not a poem of courtly love. 

Non sum qualis eram bonae sub regno Cynarae