Methamphetamine can cause wild sexual stimulation when a person does not have this stimulation on a regular basis because the drug can cause the body to produce more hormones.
Although these drugs are structurally similar to amphetamine, they cause less sensation of stimulation, and are less suited for use in conditions characterized by lack of adrenergic stimulation.
Pre-ejaculation, whenever it occurs, is a normal thing. It can never really be abnormal, unless it is spontaneous and there is no sexual stimulation going on at the time. Kissing is definitely sexual stimulation and can cause pre-ejaculation.
YES.
"Increased vagal stimulation would cause..." The heart rate to decrease.
No.
No, hydrocodone is an opiod(which it will show up as on most test) and unrelated to amphetamine.
no
no
No
increased consciousness
no
It will cause a systemic increase in blood flow throughout the entire body. This includes the vagina and clitoris. some women claim during clinical trials that it increased their sexual pleasure via this systemic stimulation, hence making them more sensative to clitoral and vaginal stimulation.