Sexual mounting?

[Nfrye]

So I have 2 male guinea pigs and lately they have had some dominance issues. I have seen them mount regularly before but this time peanut had mounted him then started humping him. Does this mean anything different than regular mounting?

 

[Wiebke]

So I have 2 male guinea pigs and lately they have had some dominance issues. I have seen them mount regularly before but this time peanut had mounted him then started humping him. Does this mean anything different than regular mounting?

Hi! How old are your boys now? It sounds like typical teenage behaviour when the big hormone spikes set in.

Please take the time to read these two guides here so you know what to look out for and what you can do to minimise potential problems as much as possible:
A Comprehensive Guide to Guinea Pig Boars (contains information about the various ages and the dos and don'ts with boars)

Boars: Teenage, Bullying, Fighting, Fall-outs And What Next?