Drzpapi I have read your posts and most of the responses and here are a few thoughts on the situation.
As far as paying for it goes, it depends on what your paying for and what you want. If you are looking for a romantic, passionate, and intimate time with someone, then I would recommend not paying this guy. Try meeting someone online, whether it be a dating webstie or a hookup website, if that is what you are looking for. But if you are just looking for a quick piece of ass and a huge cock on a hot body, then yes, feel free to pay away.
As far as it being your first time with a guy, I would not worry about it. Gay or strait, I think many of us would agree the whole first time thing is totally overblown. As for my first time, the guy was gorgeous and we met in a gay bar, but the sex was akward, clumsy, and forgettable. The first time is often not as great or remarkable as we would want it to be.
And truth be told, I doubt the quality of your life will be any less worse or better because one time you choose to pay for sex. If this is what you really want, then go for it. Honestly if a good looking guy who was 10X6 offered to let me suck his dick for money, I would probably say yes. Then again I am really into huge cocks and have only had 8, so thats just me.
As others have said, please remember if you do choose to do this, whatever you do, be safe about it. Just like with any random encounter, use preotection and don't do anything your uncomfortable with. And if you can, when you first meet, try and meet in a public place for your own safety.
Best wishes in your endevour and I look forward to hearing about how things went for you, whichever choice you made.