Is this lothario a cad or a champion?

SOMEONE referred to a wellknown sports personality the other day as ‘a serial shagger’. Aside from the fact that doesn’t grant him membership of a particularly exclusive club, I wondered who qualifies for it.

Would you, for example, have called the charming Warren Beatty, known in his prime to sleep with numerous women in a single day, by that term? Is it now an insult or does it carry, as it did then, a whiff of acclaim?