Like when boy is horny their penis get hard, what about girl?? what happen?? can someone explain clearly please?? i really wanna know..

Answer:

Viagra is a vasodilator. This means it relaxes the blood vessels and allows blood to flow easier. This is why it works to help men attain (and keep) an erection.
The developer (and maker) of Viagra is Pfizer. They are a huge corporation that would almost double their market if the pill worked on women (which is a huge amount of money). They tested it on women and found no scientific proof that it enhanced sexual excitement in women.
Women get effects from the vasodialation, and some women even claim the effects to be sexual, but the claims are not proven scientifically.
Sorry to disappoint, but no proven sexual excitement enhancement, no proven help with wetness, etc.
good luck!