Apparently, G is for more than just the G-Spot. I had difficulty choosing from all the awesome options once again, but here is a sampling:

Gamaphobia: An irrational or exaggerated fear of marriage.

Genuphallation: Sex in which the penis is inserted and stimulated between a partner’s knees. Use lube for this one — unless you like chafed knees.

GFE: Acronym for the Girlfriend Experience which refers to a type of service offered by female sex workers. The exact description will vary from person to person, but it often involves interacting with the client as a girlfriend would and may include a range of interactive activities beyond sex.

Glory Hole: A hole in a wall between rooms or bathroom stalls into which a penis (or other object) can be inserted for manual, oral or other sexual stimulation. Make sure there are no rough edges around the hole! If you’re nervous about putting your hose in the hole, you can always sit back and watch. But be sure to ask permission before you settle in ...