Marijuana is hit or miss for me. I find a very few strains are great, make you all warm, horny and concentrates the sensations, some give me serious limp dick syndrome. But often when I go back and try the same strain which got me off the first time the second result usually varies. I've never tried mixing with Viagra, so that might be a way to circumvent that issue. I've tried those vape pot pens from dosist and find most are too strong for me even labelled "arouse", "bliss" or something like that.