In general, Yes sex is considered romantic as it can be an intimate way of showing your partner you love them.
However it does not always have to be romantic, some people may enjoy doing it simply for the physical pleasure of it.
not having sex
Making love.
Sex on the beach
i dont fully understand your question, but yes. you can enter a romantic relationship with the opposite sex.
Carlotta Grisi why she is considered a renowned ballarina of the romantic era?
he is considered to have been at the start of the romantic era following the classical era
If someone is thinking romantic thoughts about the same sex then they may be a homosexual.
because
It is much better that erotic love or sensual love. Normally romantic love move away fro that need for sex. Sex is still part but you are concerned about the person.
if the girl is romantic you can never go wrong with sex
Vampire Knight ...?
Liszt's works can be considered Romantic and late-Romantic.