Help, Need Some Advice With Prostrate Stimulation ;)

hey there everyone. i was looking for some info i need on the topic of prostrate stimulation, i hope i can get some good advice here

so basically,if its ok, ill first explain a little background, so that it will be easier for anyone to give me advice on my situation.
im a straight male, happily married to a straight female, and recently we started playing around a little with the anus area. we decided to be adventorous and try getting a strapon to give her some dominance and control, but i first wanted to know some details.
for personal spiritual reasons, i try my best, to refrain from spilling any semen (if its not going into the women), and also the pre cum liquid that comes out during prostrate stimulation is considered semen. so i will want to refrain from even pre cum liquid dripping out due to prostrate stimulation. (i know this probably sounds wierd to most of u, but its a personal thing, and id rather not bring it up to debate, im just mentioning it since its very important to understand to give the proper advice to me in this case)
so for example, if my OH is giving me a blowjob, i stop her before i finish, and then we continue with normal sex. we only do blowjobs after i finish the first time with regular sex, that way i can last a good 15-20 minutes and even longer, without finishing, since it takes a while after the first time, for things to start going...
again, i know this probably doesnt make sense to most of you, but it actually helps make things more intimate and special for both of us. in any case, its not the point of the disscusion here, just a side point so that u can understand my main question

so my question bascially is, is it possible to enjoy prostrate stimulation, and to be able know before liquids start coming out of the penis? or does it just happen without warning?
will we be able to experiment with prostrate stimulation at first, while having normal sex inside her vagina, with her using a dildo to my prostrate inside, in order that i learn what the feeling is like before pre cum liquid starts coming out, so that ill be able to learn my body and when to stop, so that in the future, if we do strap on play, ill know how to stop before liquid comes out, or might it just happen without warning?

also another question, how long, on average, does it usually take for pre cum liquid to start coming out of the penis duris prostrate stimulation? (im talking about in the case of being after already one time of normal sex, so have that im mind, that my resistance to finishing will be longer than normal) for example, if shes using a strap on, on me, and im not touching my penis in any way (so that i can last longer that way and enjoy the prostrate more), how long in general can the prostrate continue to get stimulated, before liquids start coming out? if its just a matter of minutes, than i know that its not practical for us, but if it can take 10-15 minutes, than i know were in the clear
i hope thats not too graphic, and really appreciate your help and advice!
thanks!

 

Wow... It all sounds so complicated. I would think it would take the joy out of sex and the spontaneity of it. My experience, though minimal is my pre cum was without warning and depending on my arousal how long before it dripped. Orgasm itself could be felt coming on. Btw: what happens if you have a wet dream?

 

I too need some help in this area. My husband is not a fan of any ass play, but I convinced him to let me just try it last night. I told him how it would be more pleasurable and he would have more cum, and the potential health benefits of lowering prostate cancer risk. So I bought warming lube and used it on his perineum and up and down his ass right, and around the hole and then slowly pushed my middle finger in. I was sucking him off at the same time to try and take his mind off of it (was hoping to get precum or explosive cum in my mouth too). He said it was just OK at first but I wasn't in too far. As I got further in, maybe 2 inches and trying to feel for the prostate gland his dick went limp. I kept sucking it hoping to bring it back, but he said it was too uncomfortable... not painful just uncomfortable. I pulled my finger out some and got his dick hard again but he still didn't like my finger even being just inside his anus. So I pulled it out and rubbed around his ass, he doesn't seem to mind that but I couldn't get it back in since he didn't like it.

I am so bummed! I wanted him to like it and be surprised by how awesome it was. I wanted more cum for my self too, and hoped it would open the door to some ass play for both of us. Any ideas?