My boyfriend usually produces quite abit of pre ejaculate during foreplay on some days he's dry. However, there were these 3 incidents where we were staying over at his parents house. And, engaging in foreplay. I was touching his private parts at all but he was on top of me. Suddenly he would turn over holding his penis or the front of his pants will become wet.

I don't really think it was an orgasm or anything cause he didn't show any signs of it or anything. We would be making out after foreplaying for awhile and suddenly his pants would be wet. This only ever happens at his parents home and nowhere else.

Could it be due to certain environmental factors in that place? Or his positioning? Cause we've done similar things in his flat and he has ne'er produced that much liquid.. Thanks!
O ya nerves haha. He's 30 already but has never done such things there so yeah. Though I'm wondering was it alot of pre cum or sth, thx!