So when I was younger my best friend and I would "practice" on each other. We practiced just kissing at first. Making out, touching each other. At some point she stole a dildo from her mom, who apparently had enough toys she didn't notice the one missing. We made like a makeshift harness out of belts and then we "practiced" having sex and giving blowjobs.

Eventually, we realized we were more interested in "practicing" with each other than we were actually doing any of it with a guy. We talked about it, then we didn't see or talk to each other for about a month.

Then we started talking again, and started staying over at each other's houses even more often, sleeping in the same bed when before one of us would be on the floor or the couch or something, and we were doing a lot of the same things we were doing she we were "practicing", but without practice as a pretext. It wasn't about what we'd want to do with a guy,it was about what we wanted to do with each other, and we started doing more things like fingering, and eating each other out.

We've lived together since we graduated and we've been trying to decide whether we want to officially get married or not for over a year.