Why the double standard? (re: female gheyness vs. male gheyness)

[TheFaucet]

The way I see it, females can never really consummate their relationship, whereas homosexual men most certain can.While men can [censored] each other in the ass and both parties are being stimulated and able to achieve orgasm, the same cannot be said of lesbians. Women can only finger or eat each other out which means only one party is getting stimulated. In other words, dudes can have real sex with each other, whereas women cannot.