Introducing a 3rd person

My sag and I have been getting along great; understand each other; we click on all levels emotionally, physically, intellectually - it's a perfect match made in heaven if you ask me (me being an aries and all)...yada yada yada...

Here's what I will refer to as the first speed bump in the relationship. My sag is 9 years older than I am; I'm 39, you do the math. Sexually he's more experienced, has shown me more in the bedroom than anyone in my past and I'm thankful for this - it's all been done on a respectful level and I've had a blast - he's always given me the option to say, "no I don't like that, etc". So far, I haven't rejected anything he's done or shown me - it's all been great.

Here's where I'm not so sure now...he wants to know how I feel about introducing a 2nd guy in to the mix. His angle is that he wants to see another guy "please" me; watching me and being up close with me the entire time. We've talked about this in an adult manner - considering it - and that it would mean a lot to him if he could do this FOR ME; all the while giving me the option to say, "no it's just not my cup of tea".

So, I've listened to his request, and honestly, I don't know how I feel about it - I can't say I've ever experienced anything like that and I'm all about learning and adventure - always willing to try something once. But this? I don't know. I haven't told him no, but I haven't said yes either. I don't know what to think. Is this a big deal or not? All the porn I've seen, well, you get all kinds of people together - doesn't seem like a big deal - but now, it's me - I just don't know.

I guess I'd like to hear others experiences with this situation and your thoughts. Is this a sag thing or just a guy thing? We both give so unselfishly to eachother constantly - wanting to please the other on all levels, I hate to disappoint him, but I'm not so sure about this one thing.(I keep repeating myself too) Ugh....

Advice?

Thank you both for your comments. Yes I was serious asking the question, throwing it out there. This idea is so new/different for me; I really was looking for anything anyone had to say about it.

You both confirmed my gut reaction; "thanks, but no thanks."

I talked with my Sag this weekend at depth about the topic and explained to him it's just a little too "outside my box" to bring in another person. Besides, I can't think or imagine being with someone else and I didn't want to risk this creating a problem with our relationship. Anyway, he absolutely understood my point, and agreed to let it go; that it wasn't worth seeing me uncomfortable as that was the last thing he wanted; there are many other ways to be adventurous without needing a 3rd person.

I failed to mention that his Venus is in Scorpio, so he's very sexually intense; combine that with his Sag sun and well you get this sexually fun adventurous intense person. Quiet a combination.

So, we're good - like I said, just wanted to see what others had to say.