Cupid and Psyche

Of all the love stories I have read so far, this is the most intriguing for many reasons. For starters, why didn't any human want to marry Psyche? Why was Venus so jealous?
Time and time again, humans "shoot themselves in the foot" with their curiosity. Cupid and Psyche is just another example of this, as Psyche almost gets herself killed by looking into Prosperine's box. Luckily, Cupid's love for her was extremely strong and he saved her.