Boob size doesn't matter to me. I'm more into proportion, firmness and uplifted. I'm actually an ass man.

I've been to plenty of strip clubs. I've spent lots of money on women I'll never have, but that's the allure of strip clubs, isn't it? Drunk guys with money throwing it at someone they'll never see again, and if you touch them you're kicked out! Anyway, the best lap dance I received was from a lady who ribbed her ass on my crotch and then she got on her knees in front of me. I was wearing baggy shorts and she reached her hands up my shorts and began to favor me. I loved it! But then again, this was a one off and not the norm.
In our younger years, my wife and I loved to have different partners. We loved and trusted each other enough to know that it was only sex and nothing more. After all, variety is the spice of life! So yes, I watched my wife have sex with plenty of guys. It's a real turn on for me to watch her get turned on.
I met a girl 11 years my elder when I was 22. She lived about 60 minutes away and each time I drove there it was worth it. Then she told me she loved me and I kinda freaked because I had just gotten a divorce and was not looking for a lasting relationship. In hind sight, her being 33 with a couple of kids, her head was in a different space. But it was fun for both of us while it lasted!
I have given oral to another guy a few times. One was a stranger I met on the beach. The others I care not to discuss because of the Admin. rules. Perhaps we can chat in private to discuss if anyone is truly interested. I am a married man and love my wife. I don't know if I'm bi since I don't seek other men and I find women very attractive, but in the right circumstances...
Well, yes and no. We have masturbated for each other during sex. There have been times when we have masturbated believing we were in private and we walked in on each other. As a matter of routine, I masturbate whether she is home or not but I don't make it obvious. Perhaps while on the computer I'll masturbate at the table knowing she's nearby.
Yes, once. My wife and I had an open marriage and she actually talked our neighbor into going on a date with me. We went on the date and ended up at a local motel. When I got home my wife was interested in the details and we ended up having sex. She went down on me before I could shower. This isn't really what the question was regarding not knowing...sorry.