My new F/B is the oddest lay I've ever had. She's been married about 25 years and is bored with all of that and so is quite playful & pretty much up for anything. Only rule is no marks.

So the foreplay is great. She will do/let me do about anything. But the instant we get down to business & I penetrate her with my cock, she gives a big gasp & goes completely limp. First time I did her I asked her if she was o.k., she said "yes - don't stop." Eyes are open, looking off over my shoulder, a little quiet moaning & groaning, usually another nice gasp when I empty my nuts into her, and then catatonic. Until I pull my cock out. Then it's like flipping a switch. Everything is normal.

And it's just my cock. I can fuck her with a dildo and she acts completely normal. Near as I can tell she never has an orgasm when I fuck her with my cock, so I always try to get her off other ways. She says she's always been that way, doesn't know why.

It's kind of fun, actually - different anyhow. But I've never been with anyone that does that before. Anybody else run into it?