Women naturally seek other women when needing comfort, sympathy, or support. Women are also, in general, more empathetic. For related reasons, many woman will seek other women for sexual gratification; empathy accompanies the gratification.
For men, being gay or bisexual is different. Man-to-man sexual contact tends to be casual, intense, and brief. No comfort sympathy, or support is needed. A woman might also seek other woman when dissatisfied with a man who jumps on her, ejaculates, gets up, farts, and switches the TV on.