This advice is only for those of you who watch H, if you watch both H and Porn this probably won’t be of much help. It should be noted also that I've never had a girlfriend, so my advice probably should be followed dutifully; however, I feel like I should add my two cents.
First of all, if you decide to inform her of your love of H, it is paramount that you ascertain her opinions on pornography in general first, don’t tell her about your love of H to find out her opinions. If her opinions on pornography are very bad you’re going to have to stay in the closet with your love of H. If her response is simply unfavorable, you will have a few choices available to you.
The first option is to try to make her understand why you love of H. If she likes anime, you have an advantage, all you need to do in that case is tell her that while watching anime you found yourself looking for a complete depiction of romance, and that H gives you the full experience of what love is. (1) if she responds positively (2) if it’s negative.
(1)If she responds well, you need only find a H-manga or H-movie that has a strong romantic undertone to solidify your case. (For this I would recommend Take On Me, or Hatsu Inu) Depending on her, you should choose the appropriate medium I would have to recommend an H-movie, if she isn’t in to manga, you don’t want her thinking too much about your hobby while she reads. It may require a little research and asking around to find the right type of H for your girlfriend but the end result should be favorable.
(2) So she responded negatively, you poor man, in this instance you may need to abandon your H or learn to hide it from her. This needs to be done because you told her you like and look at H related material. Once you let the cat out of the bag there’s no getting it back in there. I’m sorry about your loss.
The second method you getting your girl to accept you watching H related material, is to use a process of desensitization. To achieve this you need to start watching anime together, if your are half the man you should be you should already know your girlfriends tastes, choose an appropriate anime to watch as a couple. (I recommend starting with Escaflone it’s a romance with depth, drama, and action.) Then, devise a path to anime’s with more Ecchi content, (I recommend Prism Ark,) monitoring her responses is key, once she has been desensitized enough slowly move toward H related content. Her respond in one of two ways; she will start to accept the H you are exposing her too and get frisky because of it, or she will be resistant and you are stuck returning to your closet to enjoy your H.
While the second method is a much safer bet; it is important to remember, to each his own. My methods are based in logic and human psychology, (hey, the university degree has to pay off somehow) in theory they should work, but hey in theory communism works.
There is a subspecies of Women, it was already mentioned indirectly and that species is the Fangirl. I you are dating a Fangirl you are the luckiest piece of feces alive. Often exposing a Fangirl to erotic fan fiction of the object of their Fandom is enough to get them watching and accepting your love of H. They usually have friends that love Yaoi, Yuri, and possibly Hentai, so it requires little force to change their minds about you looking at H material.
Personally, I plan to stop looking at H related material once I get a girlfriend, because she will hopefully be all the H I could want. That’s not to say I wont look at ecchi, because I’m only human.
