My gf and I are going to have her friend over tomorrow night for a group experience. We've discussed boundaries, safewords, etc. They will probably play together (my gf is bi, her friend isn't sure but is open to exploring) but the focus will be on me. I'm allowed/expected to have sex with both girls.
I'm fit and in my early 20s, and have never had trouble getting it up except for first time with my gf, she's the hottest girl I've ever been with and I got nervous. It worked out in the end, but friend is gorgeous and I'm very excited but slightly worried something like that might happen again. Should I take an ED pill ahead of time to be at the top of my game the entire night, or is that overkill? And if I should take one, which pill (I have access to Viagra and Cialis) is best? Thanks!