When I was seeing my regular guy last Summer he asked if I would double up with one of his friends, I said no. Later when we stopped seeing each other, he said he would help me meet up with one of his friends. I found out later he had passed my name, photo and number to a list of his friends. After meeting a couple I did begin to feel like a 'passaround girl' and it didnt feel great.
Im not sure if being 'shared' is that nice a prospect, but if some ladies are cool with it, then I wish them well X.