Why is feminism so closely intertwined with lesbianism?

I suppose there are all sorts of reasons for the connection between Lesbian sexual identity and feminist ideology. Not scientific, but perhaps a few reasons . . .

• If you aren't in or have no interest in a romantic relationship with a man, it may be easier in some ways to identify and acknowledge examples of sexism in wider society (and then feel moved to do something about it!)

• Feminists generally reject the idea that women should be constrained by gender stereotypes and male-defined sexual identities. Therefore, Lesbians and bisexual women may feel they will be more accepted within feminist groups than say other groupings.

• Some feminists, particularly those who identify as radical feminists, choose not to have romantic/sexual relationships with men because they feel this is incompatible with their political views. If they identify as straight, they may choose to be celibate or choose to have relationships only with other women.

• Some women will have lived much of their lives influenced by patriarchal social conditioning and conforming to gender roles, including sexual relationships with men. When they increase their awareness of feminist ideals, they may discover that they were in hetero relationships as a function of that conformity, but when not so constrained, realise they are attracted to women.