I'm surprised by most women's (& men's) posts on this.
There are 3 reasons guys "Jackhammer" with apparent disregard to their partner.
1/ They don't know any better - Easily fixed by their partner actually communicating with them - I mean it's not difficult is it. "hey, why don 't we break up the sex a bit, I like it varied, it really turns me on when you do....". It really is that simple.
2/ They've drunk so much that absolutely nothing is going to get them off.
3/ And most important - you aren't doing anything yourself to get them off, & the only way that they can retain "wood" & get some sensation is to crack it home like a bull in rutting season.
What are you actually doing to get your partner off? Just lying there- have you developed your PC muscles enough to wank him off inside, why not give him some dirty talk(most men have trigger words that make them come - mainly beginning with don't!), suck him off, suggest a 69, slap his arse,bite him, become a wanton animalistic slut - whatever! Add up how much time you've spent giving him head compared to vice-versa (for me it's probably 100-1 in the woman's favour), get some lube & give him the head of his life!
Most women aren't technically that good in bed in my experience (but of course make up for half of that by wearing sexy gear etc)-they really enjoy receiving pleasure - but just don't have the confidence (or don't care!)to ask a man what he likes, or how it is for him! So it's communication on both sides that's required.
Men do forget that most of a woman's body is an erogenous zone, mainly because men erogenous zones are around the crotch - but most men get turned on simply by their partner being turned on, & kissing, stroking etc comes from having greater intimacy - which also comes from greater communication. If you want more of this, just as he's getting ready to throw you on the bed, tell him you feek kinky & want to stand in front of the mirror while he oils you up & kiss your neck & ears while he does it. ALL MEN would like this, more foreplay for you, & a total turn on for him!
I've been appalled @ some of the statements complaining about being used like a wank machine, then giving advice on how to train your man to be your wank machine.
I've learned good sex isn't about desperately trying to have an orgasm, but enjoying the ride together, & 2 or 3 hours of doing different things,creating the intimacy with intense sexual feelings & emotions is far better - though I will say when a women is that turned on they really do appreciate & demand the old jackhammer!
Ask not what your partner can do for you, but what you can do for your partner - if you can both do this & be honest - & the female ego is as fragile as a man's - the sex will be good.