'Ramming the U-boat' refers to the act of DP of a young lady with two gentleman's parts in the same nether orifice - whether that be Dv or DA. Once one gentleman's part has been inserted, the second gentleman can be said to be 'ramming the U-boat' as he introduces his equipment alongside the first gentleman's parts - a process which will necessitate two two penii contacting each other repeatedly. The adult actress Gauge can often be seen in her films as the hostess to such an action.

While the act of 'ramming the U-boat' does involve penis-to-penis contact between two men, it's widely accepted to be only gay if the balls touch.

Referring to women who are sexually or romantically attracted to other women. Applies to both lesbians and bisexual women, as it is only the same-sex attraction that matters, not any other attractions the women may have.

Originates from the Greek poet Sappho, a bisexual woman from the Isle of Lesbos, from which we get the term lesbian.