So I think we're all more or less familiar with the traditional base metaphor, but that seems to only work if there are females involved. How does this work when it's two guys? Stealing bases I guess?
Forget the base metaphor; It's sexist, homophobic, and It's the reason why so many straight couples have terrible sex lives and horrible power imbalances in their relationships. Sex is so much happier when you stop making hierarchies. We should all use the pizza metaphor instead: To Slide or to Slice? Finding a Positive Sexual Metaphor | Scarleteen
Unfortunately this is purely hypothetical, as I have never made it to "first base" with anyone. Or to use the pizza metaphor, I've eaten a fair share of solitary and cold Little Caesar's. And I just started a diet.