I have one piece of advice for starting your first MFM: Let the woman make the first physical move. Believe me, you can save yourself a lot of drama by letting her take some control.
Of course, before you even invite him over, you should make sure that your wife/SO/GF is fully aware that things will only go as far as
she wants them to go. IOW, if she just wants a little bit of flirting or petting (*), she should know that she doesn't need to go any farther than maybe a couple of squeezes. If she's looking for some oral (giving or receiving), then the same. If she's actually ready for insertive intercourse, then the same applies. It's been said hundred of times on this board, but letting the women lead is always the smartest thing to do. And remember to keep your head. If your guest tries to take things too far, and you can tell by your SO's body language that he's going too far, then you can remind her to assert her authority (the power of the pussy, yeah!) or step in. But, if you've done your research, then you would have picked a man whose first reaction upon seeing her naked isn't shoving his tongue down her throat and grabbing her breasts.
Oh yeah, pick neutral ground. If you're in his house, you don't know what surprises can be waiting for you. Or, and this has happened to me, he can't blame you for missing items in his house ** Likewise, if you invite him to your house and he turns out to be... "less than gentlemanly", you don't have to worry about him showing up at your house for seconds or for publicly embarrassing the both of you. And you don't have to worry about him stealing things from your house. Besides, who wants to go through all of that cleaning, straightening up and hiding of kinky items? A nice hotel room that can be left in disheveled condition is a lot better than looking at your totally destroyed bedroom or living room. You pack up your goodie bag (condoms, vibrators/dildoes, lube, ball gag, whip
, whatever), meet at the appointed spot, then get ready for fun.
*(Laugh all you want, but I've met a few women in my time who were legitimate virgins when they got married. And by virgins, I mean that the only non-photographed erect penis that they'd seen up to the moment that they put their hands into my pants was their husband's. In a couple of cases, the woman hadn't even had the experience of
seeing another man's body. Apostates can be fun, look it up if you don't recognize the word.)
**(I'm still looking for a dozen CDs. That's the last time that I invite anyone over on a first liaison. They aren't replaceable by any means, so their loss really bothers me.)