Yeah, I find it a turn-on as well, but I do think it is a little weird!
Not just having a pregnant wife but also if he has a lot of children - regardless of his or his child/rens age/s. I find a man's virility/fertility quite arousing - I guess it's like the ultimate sign of manhood and masculinity. I'm sure that sounds horrible to any guys who have trouble with fertility so I'm very sorry to anyone I've hurt with that comment.
Like passiveboybigcock, I get excited at the idea of 'moment of climax'. Thinking about him being right up inside her, pumping hard, unloading a big spray of thick jizz and hitting the target is a major turn-on for me.
It appeals to both my romantic and kinky side. Romantic, because it's so intimate - a man making love to his girlfriend/wife, the ultimate act of love, unhindered by condoms, leaving a part of himself inside her and creating a new life. But also kinky, because it's so primal, like a wild animal marking it's territory by leaving it's 'scent' or 'spray'.