Ok so I have an intresting, want, I would guess, that is to help fulfill someone else's want but I thought it would be cool as well.

Is it possible to get a Bulbus Glandis or at least make the penis act like it has one?

For those of you that don't know, the Bulbus Glandis is a swelling in the lower part of the penis that locks the penis in place during intercourse. Also called a knot.

Like I would get an erection, insert, then the knot would swell up and it would lock the penis in the vagina.

Any ideas? Can this be done? Am I just crazy? Lol

How on earth would you get something to swell to that size? 

I'm going to agree.. The only thing I could think of, would be some sort of implant that you could attach a pump to, that could be pumped full of air and swell. But I don't know how you would make that work, doesn't seem likely to me.

I'm gonna ignore the part I read about women being mounted by dogs..

Hmm the only idea that comes to my mind could be saline injection.. And I'm not sure it's possible, or safe in this situation ; and it would be complicated.. Oh I know you can inject saline in the shaft but I'm not sure sure that's viable for the glans..

I mean you'd have to penetrate her first, then stay pretty still while you stick a needle in your penis and hook yourself up to the saline infusion and wait for it to work it's "magic". Another downside : the solution can take a few days to be reabsorb. Hmm so you could get stuck..

Hmm I'm no pro, I just have an active imagination..

i think that the reason some species get locked together (foxes do it and wolves i think but i am not sure) is the from what i understand the female has some sort of muscle spasm/lock which holds the male in place. as far as i know its nothing to do with a swelling but i could be wrong on that one.