Zyrexin made me SMALLER, not bigger

I understand that a lot of the herbal erection pills do 2 things:

1) Increase bloodflow to the penis

2) Increase desire and sensation

I could do without the ingredients that are supposed to increase sensation. I took Zyrexin yesterday and it gave me this tingly, giddy feeling--I felt like I'd taken a bunch of caffeine pills. I was shaky and sweaty and my penis and scrotum shriveled up like they were in cold water!

I didn't even need to take it, but I was seeing an unusually attractive woman last night--I mean way out of my league, much more attractive than I would normally get--so I wanted to last all night and be a stud. Instead I was a complete embarrassment. That stuff made my penis even smaller than if I were just normally flaccid. I blew my chances with her

Does anyone know of a product that only works on blood flow but doesn't try to stumulate you? Thanks. I'm throwing my $40.00 bottle in the trash.