I can't talk about sex, periods & masturbation with R. Way too much shame there. I've always emailed him super tough stuff though before hand, so I wouldn't have to see his reaction.

I have no problems talking about cervical smears or periods with my brother though (he's also in his third year of med school) so it's more just factual.

It's okay to go at your own pace. You can test the waters first before jumping into the deep end of the pool.