Had this talk with my gf recently. I have a toddler son, she has 3 teenage boys. I'd always been of the opinion I'm going to "hide" some porn somewhere for my son when he's older, but frankly with the internet these days, seems rather pointless. Kids these days have access to WAY more than we ever did. She had "the talk" with them when they were younger, and keeps a jar in the living room stocked with condoms, refilled as needed. I was sort of apprehensive about that, but she said it's cut way down on the amount of stiff socks that end up in the hampers, so... maybe she's on to something lol
Might have another talk coming much sooner, though. Was watching tv with my son in the bedroom, as he was jumping endlessly on the bed (little kids are so easy to make happy!) and all of a sudden he drops his pants and pullup diaper, with his little toddler dick sticking straight out, and says "Daddy I made an erection from touching myself!" It took everything I had to keep from busting out laughing. I didn't know what else to say so I was just like, "Yep, that's what happens!" Told his mom and I guess he's been really touching himself at daycare a lot too. Told her it's important that we not make it a bad thing, just a personal thing he shouldn't do around other people. Wasn't really expecting to have a "keep it in your pants" talk at age 3.5.