Not with a spouse ( never married) but I confessed to a girl I had been dating for a while about an unusual threesome I had engaged in We were sharing some sexual history which was very arousing for both of us spilling our dirty little secrets. The girl obviously was aware I have a tiny cock but she had no idea about my sph fetish ( nor even heard of such a thing) In the course of trying to get her some understanding of this particular kink I told her about the time I hooked up with a friend and his girlfriend but not in a normal MMF threesome scenario. I explained I was there just to watch them fuck while I played with myself. It was a big kick for me and an extra kick for them. They loved to perform in front of other people but I was even a larger than usual ego/performance boost for them because he is particularily well endowed and I am particularily tiny. She still didnt really understand my draw to this sort of humiliation though. Regardless it was a massive turn on for me just attempting to understand my fetish.
It seems that each time my gf and I fuck, we break a record for how lustful it feels. This has now been going on for 20 years. A big part if our success is making sure she gets off first, usually with me fingering and stroking her with LOTS of lube while she sucks my cock head to keep me hard. Then, with her vag fully dilated and legs spread wide, I enter her, but I tease the initial penetrations with short hands-free plunges right at the base of her clitorus and then sliding in her vag maybe an inch or so. I immediately pull out my stiff cock and then re-enter with the head of my cock grazing her clit a little in each transtion. This rapid exit-and-quickly-re-enter dance gets both of us fully aroused and sets the stage for an occasional deep plunge with my stiff cock. Then, it just becomes a matter of how we are going to use that stiff cock and eager wet vag to build up to a thunderous climax where both of us get off at the same time, leaving us breathless in naked embrace and full penetration until the last spasms are felt, and we doze off in that position.
The whole day of our first MFM, starting on my knees giving another guy a blowjob, holding my baby's hard-on in my other hand as he watched me get a mouthful of 'strange' cum, and then I just turned my head to get my baby off too. Then later getting fucked 3 times by our new 23-yo friend, and my baby taking sloppy seconds and mixing his cum with a fresh load from our new FB. Was out of my head with lust and I must have had 15+ orgasms in just a few hours.