RO: Viagra won't sort out someone who's genuinely completely not interested. It works on those who are interested, but just physically can't get wood. IManecdotalE, it is widely recreationally used by those who are perfectly capable, but want more / better sex per session.
When you're 19 sex is desperately important. When you're 40, yeah, done plenty of that, can't do it as much / well as I used to, and there's a lot of hassle anyway, so...thanks but no thanks. Not enough pleasure in it for the hassle involved. So...if DH just can't be arsed, it could possibly make a difference.
Look away now if this is TMI.
20 minutes or so after taking one, if you are played with, you get an instant, irrepressible chubby. It doesn't really completely subside even after you come. That is, although it's not really comfortable to do so, you can come, pause about 30 seconds to a minute later, then carry on.
Yep. Really.
A third of a 100mg tablet, which is the most I've ever taken at a time, lasts for about 12 to 15 hours, although you can still feel the effects 24 hours later.
I and others have noted a bit of a retarded ejaculation effect after the first one. If using a condom, I find I can't usually come more than once. If I take it off then I can, but more than three times is hard work (for one of you).
Woman are usually fine with this, but if you coaxed DH down this route it could mean he gets pissed off at being almost, but not quite there for ages (less familiar territory to men than women, I guess). By about the fourth or fifth time, I usually find myself pleading pathetically for a bossy BJ to get the job done.
On the positive side, I've been offered / tried thigh fucking, bagpiping and anal sex as solutions to this state of frustration. So it's a nice problem to have.
Of course...I am not a medical professional, blah blah blah. Usual caveats apply. Stonk ons that won't go down can result in injury, etc...