Not a thing to be done. In fact, for example, sometimes I still get "the traveller" every now and again when the plane lands. I have to depart with my hand luggage strategically positioned as I get off the plane.... I am 45... .your penis has a mind of it's own. You have to try and think of something boring to rid yourself of them. I think about doing my BAS tax return.... works every time.
You get them because you are young, male and normal.
If they cause problems, try to focus your mind on something else. They are nothing to be ashamed or embarrassed about and as you age, they will lessen.