I want my boyfriend to eye up other women?

I have been with my boyfriend for 7 months now and we both have a fantasy for him to oiggle other women when we go out together like shopping or clubbing. We have done a lot of tex with it in and it has turned us both on like you wouldn't believe. My boyfriend has suggested eyeing up other women when we go out and telling me about them to make me jealous and then it would make me want him even more. I do like the idea of this but wonder whether I would get to jealous and that the reality wouldn't be as good as the fantasy. My self esteem is quite low anyway so am not really sure if we should be doing this. I suppose there is no harm in him looking. It has even been suggested that he tells me who he would go for if he was single and things like that. Is this a bad idea?