It all depends, but I understand your feeling kind of weird just standing there or sitting in the corner. I, for one, can not do that.
There are plenty of times though that my participation is very limited, but that is just fine with me, watching is awesome facelick !
Here is how I do it and still feel comfortable (not weird for just watching):
I always help getting the 4-play started. I help get her undressed and participate in the carressing, rubbing, sucking etc....
Once things start to get really hot between the two of them I just back out of the picture a little. I remain in the same bed and help very little. I will rub Mrs Naughty's arm or leg or give her an occasional kiss where I can fit in. All three remain in the bed with 95% of the action taking place just between Mrs Naughy and the other M.
When they are done rocking each others world I slide over to get mine rocked by Mrs Naughty facelick .
So to sum it up, I am not sitting in the corner or in front of the bed with a stiffy like some kind of pervert
.
I stay just engaged enough to be engaged.
Make sense?
But there is also plenty of times where the other M and I equaly participate through the entire experience, which is also awesome facelick !!
I get much gratifcation out of each scenario. As long as I see mrs Naughty completely let go and enjoy herself, the expereince was one to remember
.