Depends on the person if he/she feels bad. Feeling bad is a natural phenomenon of a human.
it is the physical feeling of a person,if he is motivated or not
Under certain circumstances it is entirely normal.
Because you want a girlfriend but don't have one. Its a natural feeling.
Natural physical barriers
yes, this is natural, so dont worry
Why are you suppose to hate this person? Love is a feeling that can grow for a person. If you love this person, that's a natural feeling. Hopefully they feel the same way about you.
No. Go see a doctor.
Something people who have never done real drugs call feeling happy/adrenaline rush.
A natural treatment for is simply talking to someone about it. Being social and going out and meeting new people helps in feeling a sense of belonging and happiness.
When a male gets a natural feeling for another male or female it shows their affection or if they want sexual relations.
centrifugal force