Among gay Doms on the London scene pup is quite divisive - there are those that love 'em and those that really hate 'em. I have to admit I started as the latter and then got converted to the pup side by our now alpha about 2 years ago.
The main thing I have come to appreciate about pups as subs is the totally different dynamic they can bring to a scene. Pups are fun, pups are playful, pups can be cheeky which can all add a whole lot of new pleasures. Pups are also cute and adorable, you can love them and pet them and play with them as well. Our alpha knows he is not allowed on the sofa (though he also knows if he is very cute he can wriggle his way on with us and get away with it). Of course this means the moment our backs are turned the sofa is the first place he wants to be. He also loves to steal my boxer shorts when he can. It is both very funny and very sweet when about to get dressed after a sex session I start looking for my underwear and find the pup has stolen them and is now running naked round the garden with them on his head (seriously - or he hides them in his basket and I have to retrieve them). Of course then the game is that he doesn't want to give them back so we end up playing tug of war with them. This is just one of the games we can play with all of his toys - his favorites being Tig Tig his fluffy tiger, his squeaky pig toy called Sausages and his rope bone. Watching pups play with their toys (or joining in) is a ridiculous amount of fun and completely unexpectedly I found it turns me on like crazy. Last summer we went to the Doggy Weekender in Manchester. One of the highlights for me was going to a club on three floors and in the basement the entire dance floor had been covered in soft padded matting and covered with pup toys. There was the most almighty pup mosh going on. Loads of pups all wrestling after toys and playing with each other is an amazing spectacle to behold. (I was also quite proud of how alpha our pup was and dominating the other pups - truth be told).
When a sub is in pup space they are totally engrossed in the present moment, totally focused on their surroundings and their handler. It is such a release from all the normal anxiety and stress of the world - for both the pup and the handler. Of course they are very easily distracted and more often than not on a constant quest for pupper treats (we use frozen chocolate buttons - but many pups have different treats they prefer - one once messaged me "I am a total slut for gummi bears" - how's that for a cheap date!). You can train pups, teach them commands and tricks 'find the bone' is fun - work it out - ;). Plus you get to punish them as well. A chastity cage is normally a must for good pup order as they will hump your leg/boots given half the chance. Some handlers are more disciplinarian and have pups that are always impeccably behaved - but for myself I enjoy a bit of pup chaos now and then!