I have seen a Guy a couple of times of this Sister Site who always uses a Strap On to fuck, I think he has problems maintaining an erection which can happen. I was a bit sceptical at first but once he put it on and started fucking me it felt great. In the absence of the real thing it is a good alternative.
I have used a dildo that you put your cock inside ok for receiver but not the giver you don't have any sensation so me and my partner changed after so often so we both had enjoyment it was nice going in opening me up nice
Had a partner who use to fuck me with a strap on. She loved it as much as me, sadly lost to the big C.
We would fantasise about being caught by either a guy or girl and what we would do. Suck cock for me or lick pussy for her.
Now got an inflatable cock for play, still want the real thing but very inexperienced and nervous. Tend to cum quick when sucking and wanking guys so don't want to disappoint.
Some married/partnered men are terrified of getting any kind of infection, who can blame them?
I will use a dildo or strap-on with a condom. Everyone seems to enjoy it and I notice huge numbers of, so-called straight men asking for women to do it. What's the differerence you manly men?