they are two different things. being hard is blood flow to the penis, guys who have a hard time getting hard usually have blood flow issues as it is.. meaning most likely they have the early stages of heart disease. thats why its important to stay in good shape and eat good, exercise etc if you want to keep the little guy working his best
I take Tstack, which is a legal supplement to help increase my loads, confidence, and aggression in bed. it really works>
http://goo.gl/meYcIM
it is heart safe and does not cause side effects
as for stimuli I could write a book on that. just remember guys are VISUAL. so looking hot and not looking hot will make or break things. I personally like a woman who wears sexy bra/panties. not a fan of the whole leather thing or looking too emo. but other guys have different tastes