A manwhore, pathetic, waste of human life, an abomination, there are allot of things you could call him
A man.
Santa Plause.
A lot!
A Womanizer.
A man who is sleeping with a lot of women can be a simultaneous dater. However, if a man is dating or married to another woman and is sleeping with a lot of women is a cheater. It's the same with women, if she sleeps with a lot of men. Also he can be called a manwhore or player.
If you are trying to be offensive, you could call them a "Know-It-All" or if it is complimentary, just call them a genius.2nd Answerer says:I believe the term you are looking for is 'polymath'; or someone who studies to obtain universal knowledge would be a 'Renaissance Man/Woman'.
She had a lot of affairs.
A philanderer is a married man who has affairs with women other than his wife.
A man who is a leader in national or international affairs.
The cast of A Day of a Man of Affairs - 1929 includes: Maury Holland Mell Ray Ginger Rogers
Astrology is the belief that heavenly bodies influence the affairs of people.
Rode