When I first met my wife, she was quasi-dating a married coworker - he was married and so they hadn't had any formal dates yet, but they met often for lunch and she enjoyed giving him sexy BJs, - he used his fingers to pleasure her - in the car. It's all another story as she had sex with him for the first time after we got married, - it happened in our marital bed. She invited him to our home after we discussed it - she wanted to "go all the way with him."
He had what some of us would consider a "Smallish" penis and I understood immediately the first time we had a threesome with him. We were in our 30s then - and his loads were huge and messy. To be honest, I'd never seen a man cum so much, it was easily double what I could summon up on my best day! And it took a while but my wife finally fessed up that she loved it, as she felt like she'd been fucked, and, she said: "I can feel it draining for hours." His wife wasn't giving him sex (or so he said) and so he needed release.....