This may vary with age, and I'm 51, so here goes.
1) Length of time - depends on how full my stomach is, if fairly empty, probably 45 minutes if that. (I prefer not to be bloated when I play anyway)
2) I think it's harder than usual, and rather than alternating from semi-hard to hard, it stays that way. The Mrs. comments that she certainly enjoys sucking on a Viagra enhanced bone
3) Negative side effects - sometimes a slight headache, just take a few aspirin when you take the Viagra
4) Serious side effects - None for me at all. But if you've got a heart condition, talk to your doctor first.
5) Recovery time - 30 minutes. And, at my age, a second round in that time period would result in being semi-hard lots of the time, perhaps without orgasm (and it would probably be more like an hour of recovery normally). The nice thing about Viagra is not just the 30 minutes, but nice & hard again, and cumming again is also gonna happen.
GOOD STUFF !!!!!!! The wife is just as wild about it if not more than me.
