How many other girls do it?
Most Helpful Girl
Backups? No that's fucked up.
And so many guys here think it's ok for men to have backups, yet call women every name in the book if they do. Interesting.
Most Helpful Guy
Some girls do, some girls don't.
Girls that have had bad past relationships (and are less sympathetic) are more prone to doing this whereas girls who have had decent, civil relationships are more likely to break up then find a new guy.
What you are describing is sometimes termed "hopping from penis to penis".