Now I finally learned what the main difference between men and women is:

Men can love one person at a time, but meanwhile, are able to sleep with several others and they are still in love with that one object of their dreams - the only person on their mind.

But women...

They can love many others at a time, but they can't sleep with more than one....

That's why straight men sleep with any woman, straight women feel betrayed all the time, gay men never realize which ONE guy they truely love and lesbian women have a greater rate of relationship success!