Both ads are written well enough, but there's nothing particularly juicy about either one. You sound like a nice guy who loves his wife, one who is perhaps just a little sad or aimless, but smart and pleasant. What you don't sound like, in spite of your clearly articulated desires, is someone who is really looking for hot sex or a hot (albeit secondary) relationship.
I might hire you, I'd probably have coffee with you, but - and I mean this kindly - I wouldn't f*** you.
If you want that to happen, you're going to have to write ads that actually make room for another woman in your life. What can you do for her? What do you want from her?
What if your FWB ad looked a little more like this?:
I want someone I can hang out with.....have you come over or I come to your place, talk, watch movies, play video games.....listen to music. Maybe go out for a drink or a movie occasionally. I want the click, where there's chemistry and attraction. I would love for it to get physical, making out, heavy petting, oral or full blown sex, your choice. I like it all.
Age is unimportant (legal obviously!), looks are important to a point, but I have no specific "type", I like the BBWs as well as skinny, toned women.....all depends on the complete package. Be able to hold a conversation! As hot as you may be, if you're dumb, that turns me off & then we won't have much to talk about.
Drug (I don't consider weed a drug) and disease free, prefer non-smoking and near by (Lynnwood, Edmonds, MLT, etc.). It's fine if you're in a relationship, married or not, as long as he/she knows about it.
Same words, ordered a little differently. A little more direct, maybe a little more effective. Does any of this resonate for you?