I think like a lot of Morrissey's lyrics, it can be about mutliple things at once. The surface 'prostitute named Veronica' reading is certainly present, and there has already been some great analysis on this thread (I must admit thinking about the connection between 'bell ringing' and clitoris tickling, but was too shy to put it, so glad I'm not the only one). I think the verse about animals may well be encouraging someone (possibly a younger Morrissey with all his hangups) to get with it and join in with nature and their natural urges (birds do it, beeds do it - even educated dolphins, fish and owls do it). An acceptance of physical sexuality has certainly been a recurring theme since 'Ringleader' and 'At Last I A Born'.
At the same time I can certainly see elements of Morrissey casting himself in the role of 'musical prostitute' ( as I believe Freddie Mercury once referred to himself). Here are my musical wares, he entices the listener/record companies: this could be your last chance, so download my songs into your pocket device and love me, love me, as you'll miss me when Im gone. Again, a recurring Morrissey theme. Heck, he'll even play harmonica.
There's also a touch of just persuading people to more generally let go of the routine and follow their dreams, with the stuff about make their mark and become the spark. It reminds me of one of the few decent lines in 'List of the Lost': Look at the blue of the sky and tell me why you held back. Did you think there would one day be a bluer sky and a better hour?